| order | 21420 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C5 · Schur multiplier (H2) = C2 |
| direct product | C5×D7×D153 |
| unambiguous semidirect product | (C9×D7)⋊(C5×D17) |
| unambiguous semidirect product | (D7×C17)⋊(C5×D9) |
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C5 | D7×D153 |
| commutator, cosocle, hypocenter | C7×C9×C17 | C22×C5 |
| Frattini | C3 | C5×D7×D51 |
| 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 44 normal subgroups are shown.
This group has 120 conjugacy classes of subgroups — too many to draw. Only its 44 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)(19,21)(20,24)(22,23)(25,26)(27,28,30,32,33,31,29)(34,35,36,37,38);(1,2,4,6,8,10,12,14,16,17,15,13,11,9,7,5,3)(18,19,22,24,26,25,20,23,21)(28,29)(30,31)(32,33)1950 conjugacy classes. The character table is too large to display.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(21420, 76);