Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C26 |
| direct product | C2×D5⋊#100 |
| unambiguous semidirect product | D5⋊(C2×#100) |
| Sylow | C5 ⋊ C22×#100 |
992 conjugacy classes of subgroups; only the 210 normal subgroups are shown.
This group has 992 conjugacy classes of subgroups — too many to draw. Only its 210 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 80 |
64 conjugacy classes — view the full character table.
| maximal subgroup of | #13021723, #13021724, #13021753, … |
| maximal normal subgroup of | #13021723, #13021724, #13021753, … |
| maximal quotient of | C2×D5⋊#323, D5⋊#1460, C2×#10604932, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 19583);