| order | 21420 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C5 · Schur multiplier (H2) = C2 |
| direct product | C5×D9×D119 |
| unambiguous semidirect product | (C7×D9)⋊(C5×D17) |
| unambiguous semidirect product | (C17×D9)⋊(C5×D7) |
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C5 | D9×D119 |
| commutator, cosocle, hypocenter | C7×C9×C17 | C22×C5 |
| Frattini | C3 | C5×D3×D119 |
| Fitting | C5×C7×C9×C17 | C22 |
| socle | C3×C5×C7×C17 | C2×D3 |
| LCS | G ▷ C7×C9×C17 | |
| UCS | C1 ◁ C5 | |
120 conjugacy classes of subgroups; only the 42 normal subgroups are shown.
This group has 120 conjugacy classes of subgroups — too many to draw. Only its 42 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| minimal degree | μ(G) = 38 |
| transitive degree | μt(G) = 5355 |
A minimal faithful permutation representation — 2 generators on 38 points:
(2,3)(4,5)(6,7)(8,9)(10,11)(12,13)(14,15)(16,17)(19,20)(21,22)(23,24)(25,30,28,27,32,29,31,26,33)(34,35,36,37,38);(1,2,4,6,8,10,12,14,16,17,15,13,11,9,7,5,3)(18,19,21,23,24,22,20)(26,28)(27,31)(29,32)(30,33)1830 conjugacy classes. The character table is too large to display.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(21420, 77);