Finite Group DatabasebetaFinite Group Databasebeta| order | 20420 |
| automorphism | ? |
| homology | Abelianization (H1) = C4×C5 · Schur multiplier (H2) = C1 |
| unambiguous semidirect product | #16861391⋊C5 |
| Fitting, socle, derived, Sylow | C1021 ⋊ C4×C5 |
| Hall | C1021⋊C5 ⋊ C4 |
| Hall | #16861391 ⋊ C5 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini, hypercenter | C1 | G |
| commutator, Fitting, socle, hypocenter | C1021 | C4×C5 |
| prime radical | D1021⋊C5 | C2 |
| cosocle | D1021 | C2×C5 |
| LCS | G ▷ C1021 | |
| UCS | C1 | |
12 conjugacy classes of subgroups.
| transitive degree | μt(G) = 1021 |
Polycyclic presentation:
2,5,2,1021|a^2=c,d^a=d^647,d^b=d^589,d^c=d^102071 conjugacy classes — view the full character table.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(20420, 8);