Finite Group Databasebeta

← C₂×D₇₉₉₉ #44544607

Subgroups — C₂×D₇₉₉₉ #44544607

Order 31996.

20 conjugacy classes of subgroups.

Conjugacy classes of subgroups

#	subgroup	G/H	class size	multiplicity	normal?	properties
1	C₂×C₁₉×C₄₂₁	C₂	1	1	yes	maximal, characteristic, complemented
2	D₇₉₉₉	C₂	1	2	yes	maximal, direct product factor
3	C₁₉×C₄₂₁	C₂²	1	1	yes	characteristic, complemented, Hall
4	C₂×D₄₂₁	—	19	1	no	maximal, Hall
5	C₂×C₄₂₁	D₁₉	1	1	yes	characteristic, complemented
6	D₄₂₁	—	19	2	no	—
7	C₄₂₁	C₂×D₁₉	1	1	yes	characteristic, complemented, Sylow
8	C₂×D₁₉	—	421	1	no	maximal, Hall
9	C₂×C₁₉	D₄₂₁	1	1	yes	characteristic, complemented
10	D₁₉	—	421	2	no	—
11	C₁₉	C₂×D₄₂₁	1	1	yes	characteristic, complemented, Sylow
12	C₂²	—	7999	1	no	Sylow
13	C₂	—	7999	2	no	—
14	C₂	D₇₉₉₉	1	1	yes	characteristic, direct product factor

	subgroup	G/H
center, hypercenter	C₂	D₇₉₉₉
commutator, cosocle, hypocenter	C₁₉×C₄₂₁	C₂²
Frattini	C₁	G
Fitting, socle	C₂×C₁₉×C₄₂₁	C₂
LCS	G ▷ C₁₉×C₄₂₁
UCS	C₁ ◁ C₂

Complements

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

N	H ≅ G/N	type
1. C₂×C₁₉×C₄₂₁	C₂	semidirect
2. D₇₉₉₉	C₂	direct (N × H)
3. C₁₉×C₄₂₁	C₂²	semidirect
5. C₂×C₄₂₁	D₁₉	semidirect
7. C₄₂₁	C₂×D₁₉	semidirect
9. C₂×C₁₉	D₄₂₁	semidirect
11. C₁₉	C₂×D₄₂₁	semidirect
14. C₂	D₇₉₉₉	direct (N × H)

Maximal subgroups

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

subgroup	index
C₂×C₁₉×C₄₂₁	2
D₇₉₉₉	2
C₂×D₄₂₁	19
C₂×D₁₉	421