Finite Group DatabasebetaFinite Group DatabasebetaOrder 21556.
12 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C2×C17×C317 | C2 | 1 | 1 | yes | maximal, characteristic |
| 2 | C17×C317 | C4 | 1 | 1 | yes | characteristic, complemented, Hall |
| 3 | C4×C317 | — | 17 | 1 | no | maximal, Hall |
| 4 | C2×C317 | D17 | 1 | 1 | yes | characteristic |
| 5 | C317 | Dic17 | 1 | 1 | yes | characteristic, direct product factor, Sylow |
| 6 | Dic17 | C317 | 1 | 1 | yes | maximal, characteristic, direct product factor, Hall |
| 7 | C2×C17 | C2×C317 | 1 | 1 | yes | characteristic |
| 8 | C17 | C4×C317 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 9 | C4 | — | 17 | 1 | no | Sylow |
| 10 | C2 | D17×C317 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C2×C317 | D17 |
| commutator, hypocenter | C17 | C4×C317 |
| Frattini | C2 | D17×C317 |
| Fitting, socle, prime radical | C2×C17×C317 | C2 |
| cosocle | C2×C17 | C2×C317 |
| LCS | G ▷ C17 | |
| UCS | C1 ◁ C2×C317 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 2. C17×C317 | C4 | semidirect |
| 5. C317 | Dic17 | direct (N × H) |
| 6. Dic17 | C317 | direct (N × H) |
| 8. C17 | C4×C317 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C2×C17×C317 | 2 |
| C4×C317 | 17 |
| Dic17 | 317 |