Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C26 |
| direct product | C2×#65690 |
| unambiguous semidirect product | D5⋊#383 |
| Fitting | C2×C42×C5 ⋊ C4 |
| Sylow | C5 ⋊ C2×#383 |
624 conjugacy classes of subgroups.
| transitive degree | μt(G) = 160 |
88 conjugacy classes — view the full character table.
| maximal subgroup of | #13015557, #13015560, C2×#10598528, … |
| maximal normal subgroup of | #13015557, #13015560, C2×#10598528, … |
| maximal quotient of | C2×#10604197, C4×#65690, C2×#10603803, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 19127);