Finite Group DatabasebetaFinite Group Databasebeta| order | 1920 |
| nilpotency class | 3 |
| isoclinism | isoclinic class of D8 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C3×C4×C5 · Schur multiplier (H2) = C26 |
| direct product | C22×C3×C5×#104 |
| subgroup | G/H | |
|---|---|---|
| center | C22×C3×C4×C5 | D4 |
| commutator | C4 | C23×C3×C4×C5 |
| Frattini, cosocle | C2×C4 | C24×C3×C5 |
| socle | C23×C3×C5 | C22⋊C4 |
| prime radical | C22×C3×C5×#41 | C2 |
| LCS | G ▷ C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22×C3×C4×C5 ◁ C23×C3×C4×C5 ◁ G | |
1712 conjugacy classes of subgroups.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 480 |
A minimal faithful permutation representation — 4 generators on 20 points:
(1,2)(13,14,15)(16,17,18,19,20);(3,4);(5,6,8,11,9,7,12,10);(5,7)(6,9)(8,10)(11,12)840 conjugacy classes — view the full character table.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(1920, 1631);