Subgroups — C₁₉×#8469 #18014428

Order 4864.

1092 conjugacy classes of subgroups.

The subgroup lattice has 394 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#	subgroup	G/H	class size	multiplicity	normal?	properties
1	C₁₉×#3498	C₂	1	1	yes	maximal, characteristic
2	C₁₉×#1965	C₂	1	2	yes	maximal, complemented
3	C₁₉×#1560	C₂	1	1	yes	maximal, characteristic, complemented
4	C₁₉×#1525	C₂	1	1	yes	maximal, characteristic, complemented
5	C₁₉×#1489	C₂	1	2	yes	maximal, complemented
6	C₂×C₁₉×H(5,𝔽₂)	C₄	1	2	yes	—
7	C₁₉×#550	—	2	2	no	—
8	D₄²×C₁₉	—	2	4	no	—
9	D₄²×C₁₉	—	2	2	no	—
10	C₁₉×#535	—	2	2	no	—
11	C₁₉×#535	C₄	1	2	yes	—
12	C₁₉×#532	—	2	1	no	—
13	C₁₉×#532	C₂²	1	1	yes	characteristic
14	C₂×C₁₉×#127	—	2	1	no	—
15	C₂×C₁₉×#127	C₂²	1	1	yes	characteristic
16	C₄×#41×C₁₉	C₂²	1	1	yes	characteristic
17	C₁₉×#423	C₂²	1	2	yes	complemented
18	C₂×C₁₉×#100	—	2	4	no	—
19	C₄×M₁₆×C₁₉	C₂²	1	2	yes	complemented
20	C₁₉×#333	—	2	1	no	—
21	C₁₉×#331	—	2	1	no	—
22	C₁₉×#329	—	2	2	no	—
23	C₁₉×Q₈⋊C₈	—	2	2	no	—
24	C₁₉×D₄⋊C₈	—	2	2	no	—
25	C₁₉×H(5,𝔽₂)	—	4	4	no	—
26	C₁₉×H(5,𝔽₂)	—	4	4	no	—
27	C₂×#41×C₁₉	—	2	2	no	—
28	C₂×#41×C₁₉	—	2	2	no	—
29	C₂×#41×C₁₉	C₂×C₄	1	1	yes	characteristic
30	C₂×#41×C₁₉	C₂×C₄	1	2	yes	—
31	C₂²×D₄×C₁₉	—	2	4	no	—
32	C₂²×D₄×C₁₉	—	2	4	no	—
33	C₂²×D₄×C₁₉	—	2	2	no	—
34	C₂²×D₄×C₁₉	—	2	2	no	—
35	C₂²×D₄×C₁₉	C₂×C₄	1	2	yes	—
36	C₂²×D₄×C₁₉	D₄	1	4	yes	—
37	C₂×M₁₆×C₁₉	—	2	2	no	—
38	C₂×M₁₆×C₁₉	—	2	2	no	—
39	C₁₉×C₄⋊Q₈	D₄	1	1	yes	characteristic
40	C₁₉×#127	—	2	4	no	—
41	C₁₉×#127	—	2	2	no	—
42	C₁₉×#127	—	2	1	no	—
43	C₁₉×#127	—	2	1	no	—
44	C₁₉×#127	—	2	2	no	—
45	C₁₉×#127	D₄	1	1	yes	characteristic
46	C₁₉×#124	—	2	2	no	—
47	C₁₉×#124	D₄	1	2	yes	—
48	C₁₉×#121	—	2	4	no	—
49	C₁₉×#121	—	2	8	no	—
50	C₁₉×#121	—	2	2	no	—
51	C₁₉×#121	—	2	4	no	—
52	C₁₉×#120	—	2	8	no	—
53	C₁₉×#120	—	2	4	no	—
54	C₄×Q₈×C₁₉	D₄	1	2	yes	—
55	C₄×D₄×C₁₉	—	2	4	no	—
56	C₄×D₄×C₁₉	—	2	2	no	—
57	C₄×D₄×C₁₉	—	2	2	no	—
58	C₄×D₄×C₁₉	D₄	1	2	yes	—
59	C₁₉×#117	—	2	1	no	—
60	C₁₉×#117	C₂×C₄	1	1	yes	characteristic
61	C₂×C₄²×C₁₉	—	2	1	no	—
62	C₂×C₄²×C₁₉	C₂³	1	1	yes	characteristic
63	C₁₉×C₄⋊C₈	—	2	2	no	—
64	C₁₉×C₄⋊C₈	—	2	2	no	—
65	C₁₉×#100	—	4	8	no	—
66	C₁₉×#97	—	2	2	no	—
67	C₄×C₈×C₁₉	—	2	2	no	—
68	C₂⁴×C₁₉	—	2	4	no	—
69	C₂⁴×C₁₉	C₂²⋊C₄	1	4	yes	—
70	#41×C₁₉	—	2	2	no	—
71	#41×C₁₉	—	2	2	no	—
72	#41×C₁₉	—	4	8	no	—
73	#41×C₁₉	—	4	2	no	—
74	#41×C₁₉	—	4	2	no	—
75	#41×C₁₉	—	4	4	no	—
76	#41×C₁₉	—	4	4	no	—
77	C₂×Q₈×C₁₉	C₂²⋊C₄	1	1	yes	characteristic
78	C₂×Q₈×C₁₉	C₂²⋊C₄	1	2	yes	—
79	C₂×D₄×C₁₉	—	2	1	no	—
80	C₂×D₄×C₁₉	—	2	4	no	—
81	C₂×D₄×C₁₉	—	2	4	no	—
82	C₂×D₄×C₁₉	—	2	2	no	—
83	C₂×D₄×C₁₉	—	2	8	no	—
84	C₂×D₄×C₁₉	—	2	2	no	—
85	C₂×D₄×C₁₉	—	2	2	no	—
86	C₂×D₄×C₁₉	—	2	4	no	—
87	C₂×D₄×C₁₉	—	2	2	no	—
88	C₂×D₄×C₁₉	—	2	4	no	—
89	C₂×D₄×C₁₉	—	4	8	no	—
90	C₂×D₄×C₁₉	—	4	2	no	—
91	C₂×D₄×C₁₉	—	4	2	no	—
92	C₂×D₄×C₁₉	—	4	4	no	—
93	C₂×D₄×C₁₉	—	4	4	no	—
94	C₂×D₄×C₁₉	—	4	16	no	—
95	C₂×D₄×C₁₉	—	4	4	no	—
96	C₂×D₄×C₁₉	—	4	4	no	—
97	C₂×D₄×C₁₉	—	8	4	no	—
98	C₂×D₄×C₁₉	—	8	4	no	—
99	C₂×D₄×C₁₉	C₂²⋊C₄	1	1	yes	characteristic
100	C₂×D₄×C₁₉	C₂²⋊C₄	1	2	yes	—
101	C₂²×C₄×C₁₉	—	2	1	no	—
102	C₂²×C₄×C₁₉	—	2	4	no	—
103	C₂²×C₄×C₁₉	—	2	2	no	—
104	C₂²×C₄×C₁₉	—	2	2	no	—
105	C₂²×C₄×C₁₉	C₂²×C₄	1	1	yes	characteristic
106	C₂²×C₄×C₁₉	C₂×D₄	1	2	yes	—
107	M₁₆×C₁₉	—	2	4	no	—
108	M₁₆×C₁₉	—	4	2	no	—
109	M₁₆×C₁₉	—	4	4	no	—
110	C₂×C₈×C₁₉	—	4	2	no	—
111	C₂×C₈×C₁₉	—	4	2	no	—
112	C₄⋊C₄×C₁₉	—	2	2	no	—
113	C₄⋊C₄×C₁₉	—	2	2	no	—
114	C₄⋊C₄×C₁₉	C₂²⋊C₄	1	2	yes	—
115	C₂²⋊C₄×C₁₉	—	2	8	no	—
116	C₂²⋊C₄×C₁₉	—	2	1	no	—
117	C₂²⋊C₄×C₁₉	—	2	2	no	—
118	C₂²⋊C₄×C₁₉	—	2	4	no	—
119	C₄²×C₁₉	—	2	1	no	—
120	C₄²×C₁₉	—	2	2	no	—
121	C₄²×C₁₉	C₂×D₄	1	1	yes	characteristic
122	C₄²×C₁₉	C₂×D₄	1	1	yes	characteristic
123	C₄²×C₁₉	C₂×D₄	1	2	yes	—
124	#8469	C₁₉	1	1	yes	maximal, characteristic, direct product factor, Sylow
125	C₂³×C₁₉	—	2	1	no	—
126	C₂³×C₁₉	—	2	4	no	—
127	C₂³×C₁₉	—	2	2	no	—
128	C₂³×C₁₉	—	4	8	no	—
129	C₂³×C₁₉	—	4	4	no	—
130	C₂³×C₁₉	—	4	8	no	—
131	C₂³×C₁₉	—	8	8	no	—
132	C₂³×C₁₉	C₂×C₂²⋊C₄	1	1	yes	characteristic
133	Q₈×C₁₉	—	2	1	no	—
134	Q₈×C₁₉	—	4	2	no	—
135	Q₈×C₁₉	#100	1	2	yes	complemented
136	D₄×C₁₉	—	2	4	no	—
137	D₄×C₁₉	—	2	1	no	—
138	D₄×C₁₉	—	4	2	no	—
139	D₄×C₁₉	—	4	4	no	—
140	D₄×C₁₉	—	4	8	no	—
141	D₄×C₁₉	—	4	4	no	—
142	D₄×C₁₉	—	4	8	no	—
143	D₄×C₁₉	—	4	2	no	—
144	D₄×C₁₉	—	4	2	no	—
145	D₄×C₁₉	—	4	4	no	—
146	D₄×C₁₉	—	4	2	no	—
147	D₄×C₁₉	—	4	4	no	—
148	D₄×C₁₉	—	4	2	no	—
149	D₄×C₁₉	—	8	4	no	—
150	D₄×C₁₉	—	8	8	no	—
151	D₄×C₁₉	#100	1	2	yes	complemented
152	C₂×C₄×C₁₉	—	2	4	no	—
153	C₂×C₄×C₁₉	—	2	1	no	—
154	C₂×C₄×C₁₉	—	2	1	no	—
155	C₂×C₄×C₁₉	—	2	1	no	—
156	C₂×C₄×C₁₉	—	2	2	no	—
157	C₂×C₄×C₁₉	—	2	2	no	—
158	C₂×C₄×C₁₉	—	2	2	no	—
159	C₂×C₄×C₁₉	—	2	2	no	—
160	C₂×C₄×C₁₉	—	4	8	no	—
161	C₂×C₄×C₁₉	—	4	2	no	—
162	C₂×C₄×C₁₉	—	4	2	no	—
163	C₂×C₄×C₁₉	—	4	2	no	—
164	C₂×C₄×C₁₉	—	4	2	no	—
165	C₂×C₄×C₁₉	C₂×C₂²⋊C₄	1	1	yes	characteristic
166	C₂×C₄×C₁₉	C₂×C₂²⋊C₄	1	1	yes	characteristic
167	C₂×C₄×C₁₉	#120	1	2	yes	—
168	C₂×C₄×C₁₉	#120	1	2	yes	—
169	C₈×C₁₉	—	4	4	no	—
170	C₈×C₁₉	—	8	2	no	—
171	#3498	C₂×C₁₉	1	1	yes	characteristic
172	#1965	C₂×C₁₉	1	2	yes	complemented
173	#1560	C₂×C₁₉	1	1	yes	characteristic, complemented
174	#1525	C₂×C₁₉	1	1	yes	characteristic, complemented
175	#1489	C₂×C₁₉	1	2	yes	complemented
176	C₂²×C₁₉	—	2	2	no	—
177	C₂²×C₁₉	—	2	1	no	—
178	C₂²×C₁₉	—	2	2	no	—
179	C₂²×C₁₉	—	4	2	no	—
180	C₂²×C₁₉	—	4	8	no	—
181	C₂²×C₁₉	—	4	4	no	—
182	C₂²×C₁₉	—	4	4	no	—
183	C₂²×C₁₉	—	4	2	no	—
184	C₂²×C₁₉	—	16	4	no	—
185	C₂²×C₁₉	—	16	8	no	—
186	C₂²×C₁₉	#379	1	1	yes	characteristic
187	C₄×C₁₉	—	2	2	no	—
188	C₄×C₁₉	—	2	1	no	—
189	C₄×C₁₉	—	2	2	no	—
190	C₄×C₁₉	—	4	2	no	—
191	C₄×C₁₉	—	4	2	no	—
192	C₄×C₁₉	C₂×#100	1	1	yes	characteristic
193	C₄×C₁₉	C₂×#100	1	1	yes	characteristic
194	C₄×C₁₉	#453	1	2	yes	—
195	C₄×C₁₉	#455	1	2	yes	—
196	C₂×H(5,𝔽₂)	C₄×C₁₉	1	2	yes	—
197	#550	—	2	2	no	—
198	D₄²	—	2	4	no	—
199	D₄²	—	2	2	no	—
200	#535	—	2	2	no	—
201	#535	C₄×C₁₉	1	2	yes	—
202	#532	—	2	1	no	—
203	#532	C₂²×C₁₉	1	1	yes	characteristic
204	C₂×#127	—	2	1	no	—
205	C₂×#127	C₂²×C₁₉	1	1	yes	characteristic
206	C₄×#41	C₂²×C₁₉	1	1	yes	characteristic
207	#423	C₂²×C₁₉	1	2	yes	complemented
208	C₂×#100	—	2	4	no	—
209	C₄×M₁₆	C₂²×C₁₉	1	2	yes	complemented
210	#333	—	2	1	no	—
211	#331	—	2	1	no	—
212	#329	—	2	2	no	—
213	Q₈⋊C₈	—	2	2	no	—
214	D₄⋊C₈	—	2	2	no	—
215	C₂×C₁₉	—	4	1	no	—
216	C₂×C₁₉	—	4	2	no	—
217	C₂×C₁₉	—	8	4	no	—
218	C₂×C₁₉	—	8	2	no	—
219	C₂×C₁₉	#1783	1	1	yes	characteristic
220	C₂×C₁₉	#1792	1	2	yes	—
221	H(5,𝔽₂)	—	4	4	no	—
222	H(5,𝔽₂)	—	4	4	no	—
223	C₂×#41	—	2	2	no	—
224	C₂×#41	—	2	2	no	—
225	C₂×#41	C₂×C₄×C₁₉	1	1	yes	characteristic
226	C₂×#41	C₂×C₄×C₁₉	1	2	yes	—
227	C₂²×D₄	—	2	4	no	—
228	C₂²×D₄	—	2	4	no	—
229	C₂²×D₄	—	2	2	no	—
230	C₂²×D₄	—	2	2	no	—
231	C₂²×D₄	C₂×C₄×C₁₉	1	2	yes	—
232	C₂²×D₄	D₄×C₁₉	1	4	yes	—
233	C₂×M₁₆	—	2	2	no	—
234	C₂×M₁₆	—	2	2	no	—
235	C₄⋊Q₈	D₄×C₁₉	1	1	yes	characteristic
236	#127	—	2	4	no	—
237	#127	—	2	2	no	—
238	#127	—	2	1	no	—
239	#127	—	2	1	no	—
240	#127	—	2	2	no	—
241	#127	D₄×C₁₉	1	1	yes	characteristic
242	#124	—	2	2	no	—
243	#124	D₄×C₁₉	1	2	yes	—
244	#121	—	2	4	no	—
245	#121	—	2	8	no	—
246	#121	—	2	2	no	—
247	#121	—	2	4	no	—
248	#120	—	2	8	no	—
249	#120	—	2	4	no	—
250	C₄×Q₈	D₄×C₁₉	1	2	yes	—
251	C₄×D₄	—	2	4	no	—
252	C₄×D₄	—	2	2	no	—
253	C₄×D₄	—	2	2	no	—
254	C₄×D₄	D₄×C₁₉	1	2	yes	—
255	#117	—	2	1	no	—
256	#117	C₂×C₄×C₁₉	1	1	yes	characteristic
257	C₂×C₄²	—	2	1	no	—
258	C₂×C₄²	C₂³×C₁₉	1	1	yes	characteristic
259	C₄⋊C₈	—	2	2	no	—
260	C₄⋊C₈	—	2	2	no	—
261	#100	—	4	8	no	—
262	#97	—	2	2	no	—
263	C₄×C₈	—	2	2	no	—
264	C₁₉	#8469	1	1	yes	characteristic, direct product factor, Sylow
265	C₂⁴	—	2	4	no	—
266	C₂⁴	C₂²⋊C₄×C₁₉	1	4	yes	—
267	#41	—	2	2	no	—
268	#41	—	2	2	no	—
269	#41	—	4	8	no	—
270	#41	—	4	2	no	—
271	#41	—	4	2	no	—
272	#41	—	4	4	no	—
273	#41	—	4	4	no	—
274	C₂×Q₈	C₂²⋊C₄×C₁₉	1	1	yes	characteristic
275	C₂×Q₈	C₂²⋊C₄×C₁₉	1	2	yes	—
276	C₂×D₄	—	2	1	no	—
277	C₂×D₄	—	2	4	no	—
278	C₂×D₄	—	2	4	no	—
279	C₂×D₄	—	2	2	no	—
280	C₂×D₄	—	2	8	no	—
281	C₂×D₄	—	2	2	no	—
282	C₂×D₄	—	2	2	no	—
283	C₂×D₄	—	2	4	no	—
284	C₂×D₄	—	2	2	no	—
285	C₂×D₄	—	2	4	no	—
286	C₂×D₄	—	4	8	no	—
287	C₂×D₄	—	4	2	no	—
288	C₂×D₄	—	4	2	no	—
289	C₂×D₄	—	4	4	no	—
290	C₂×D₄	—	4	4	no	—
291	C₂×D₄	—	4	16	no	—
292	C₂×D₄	—	4	4	no	—
293	C₂×D₄	—	4	4	no	—
294	C₂×D₄	—	8	4	no	—
295	C₂×D₄	—	8	4	no	—
296	C₂×D₄	C₂²⋊C₄×C₁₉	1	1	yes	characteristic
297	C₂×D₄	C₂²⋊C₄×C₁₉	1	2	yes	—
298	C₂²×C₄	—	2	1	no	—
299	C₂²×C₄	—	2	4	no	—
300	C₂²×C₄	—	2	2	no	—
301	C₂²×C₄	—	2	2	no	—
302	C₂²×C₄	C₂²×C₄×C₁₉	1	1	yes	characteristic
303	C₂²×C₄	C₂×D₄×C₁₉	1	2	yes	—
304	M₁₆	—	2	4	no	—
305	M₁₆	—	4	2	no	—
306	M₁₆	—	4	4	no	—
307	C₂×C₈	—	4	2	no	—
308	C₂×C₈	—	4	2	no	—
309	C₄⋊C₄	—	2	2	no	—
310	C₄⋊C₄	—	2	2	no	—
311	C₄⋊C₄	C₂²⋊C₄×C₁₉	1	2	yes	—
312	C₂²⋊C₄	—	2	8	no	—
313	C₂²⋊C₄	—	2	1	no	—
314	C₂²⋊C₄	—	2	2	no	—
315	C₂²⋊C₄	—	2	4	no	—
316	C₄²	—	2	1	no	—
317	C₄²	—	2	2	no	—
318	C₄²	C₂×D₄×C₁₉	1	2	yes	—
319	C₄²	C₂×D₄×C₁₉	1	1	yes	characteristic
320	C₄²	C₂×D₄×C₁₉	1	1	yes	characteristic
321	C₂³	—	2	1	no	—
322	C₂³	—	2	4	no	—
323	C₂³	—	2	2	no	—
324	C₂³	—	4	8	no	—
325	C₂³	—	4	4	no	—
326	C₂³	—	4	8	no	—
327	C₂³	—	8	8	no	—
328	C₂³	C₂×C₂²⋊C₄×C₁₉	1	1	yes	characteristic
329	Q₈	—	2	1	no	—
330	Q₈	—	4	2	no	—
331	Q₈	C₁₉×#100	1	2	yes	complemented
332	D₄	—	2	4	no	—
333	D₄	—	2	1	no	—
334	D₄	—	4	2	no	—
335	D₄	—	4	4	no	—
336	D₄	—	4	8	no	—
337	D₄	—	4	4	no	—
338	D₄	—	4	8	no	—
339	D₄	—	4	2	no	—
340	D₄	—	4	2	no	—
341	D₄	—	4	4	no	—
342	D₄	—	4	2	no	—
343	D₄	—	4	4	no	—
344	D₄	—	4	2	no	—
345	D₄	—	8	4	no	—
346	D₄	—	8	8	no	—
347	D₄	C₁₉×#100	1	2	yes	complemented
348	C₂×C₄	—	2	4	no	—
349	C₂×C₄	—	2	1	no	—
350	C₂×C₄	—	2	1	no	—
351	C₂×C₄	—	2	1	no	—
352	C₂×C₄	—	2	2	no	—
353	C₂×C₄	—	2	2	no	—
354	C₂×C₄	—	2	2	no	—
355	C₂×C₄	—	2	2	no	—
356	C₂×C₄	—	4	8	no	—
357	C₂×C₄	—	4	2	no	—
358	C₂×C₄	—	4	2	no	—
359	C₂×C₄	—	4	2	no	—
360	C₂×C₄	—	4	2	no	—
361	C₂×C₄	C₂×C₂²⋊C₄×C₁₉	1	1	yes	characteristic
362	C₂×C₄	C₂×C₂²⋊C₄×C₁₉	1	1	yes	characteristic
363	C₂×C₄	C₁₉×#120	1	2	yes	—
364	C₂×C₄	C₁₉×#120	1	2	yes	—
365	C₈	—	4	4	no	—
366	C₈	—	8	2	no	—
367	C₂²	—	2	1	no	—
368	C₂²	—	2	2	no	—
369	C₂²	—	2	2	no	—
370	C₂²	—	4	2	no	—
371	C₂²	—	4	4	no	—
372	C₂²	—	4	2	no	—
373	C₂²	—	4	8	no	—
374	C₂²	—	4	4	no	—
375	C₂²	—	16	4	no	—
376	C₂²	—	16	8	no	—
377	C₂²	C₁₉×#379	1	1	yes	characteristic
378	C₄	—	2	1	no	—
379	C₄	—	2	2	no	—
380	C₄	—	2	2	no	—
381	C₄	—	4	2	no	—
382	C₄	—	4	2	no	—
383	C₄	C₂×C₁₉×#100	1	1	yes	characteristic
384	C₄	C₂×C₁₉×#100	1	1	yes	characteristic
385	C₄	C₁₉×#453	1	2	yes	—
386	C₄	C₁₉×#455	1	2	yes	—
387	C₂	—	4	1	no	—
388	C₂	—	4	2	no	—
389	C₂	—	8	2	no	—
390	C₂	—	8	4	no	—
391	C₂	C₁₉×#1783	1	1	yes	characteristic
392	C₂	C₁₉×#1792	1	2	yes	—

	subgroup	G/H
center, socle	C₂²×C₁₉	#379
commutator	C₂²×C₄	C₂²×C₄×C₁₉
Frattini, cosocle	C₂×C₄²	C₂³×C₁₉
prime radical	C₁₉×#3498	C₂
LCS	G ▷ C₂²×C₄ ▷ C₂² ▷ C₁
UCS	C₁ ◁ C₂²×C₁₉ ◁ C₂×C₄²×C₁₉ ◁ G

Complements

Splittings G = N ⋊ H with N normal; H ≅ G/N.

N	H ≅ G/N	type
2. C₁₉×#1965	C₂	semidirect
3. C₁₉×#1560	C₂	semidirect
4. C₁₉×#1525	C₂	semidirect
5. C₁₉×#1489	C₂	semidirect
17. C₁₉×#423	C₂²	semidirect
19. C₄×M₁₆×C₁₉	C₂²	semidirect
124. #8469	C₁₉	direct (N × H)
135. Q₈×C₁₉	#100	semidirect
151. D₄×C₁₉	#100	semidirect
172. #1965	C₂×C₁₉	semidirect
173. #1560	C₂×C₁₉	semidirect
174. #1525	C₂×C₁₉	semidirect
175. #1489	C₂×C₁₉	semidirect
207. #423	C₂²×C₁₉	semidirect
209. C₄×M₁₆	C₂²×C₁₉	semidirect
264. C₁₉	#8469	direct (N × H)
331. Q₈	C₁₉×#100	semidirect
347. D₄	C₁₉×#100	semidirect

Maximal subgroups

By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.

subgroup	index
C₁₉×#3498	2
C₁₉×#1965	2
C₁₉×#1560	2
C₁₉×#1525	2
C₁₉×#1489	2
#8469	19

Subgroups — C19×#8469 #18014428

Conjugacy classes of subgroups

Complements

Maximal subgroups

Subgroups — C₁₉×#8469 #18014428