Finite Group DatabasebetaFinite Group DatabasebetaOrder 256.
22 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C2×C64 | C2 | 1 | 1 | yes | maximal, characteristic |
| 2 | C128 | C2 | 1 | 2 | yes | maximal, complemented |
| 3 | C2×C32 | C4 | 1 | 1 | yes | characteristic |
| 4 | C64 | C4 | 1 | 1 | yes | characteristic |
| 5 | C64 | C22 | 1 | 1 | yes | characteristic |
| 6 | C2×C16 | C8 | 1 | 1 | yes | characteristic |
| 7 | C32 | C8 | 1 | 1 | yes | characteristic |
| 8 | C32 | C2×C4 | 1 | 1 | yes | characteristic |
| 9 | C2×C8 | C16 | 1 | 1 | yes | characteristic |
| 10 | C16 | C16 | 1 | 1 | yes | characteristic |
| 11 | C16 | C2×C8 | 1 | 1 | yes | characteristic |
| 12 | C2×C4 | C32 | 1 | 1 | yes | characteristic |
| 13 | C8 | C32 | 1 | 1 | yes | characteristic |
| 14 | C8 | C2×C16 | 1 | 1 | yes | characteristic |
| 15 | C22 | C64 | 1 | 1 | yes | characteristic |
| 16 | C4 | C64 | 1 | 1 | yes | characteristic |
| 17 | C4 | C2×C32 | 1 | 1 | yes | characteristic |
| 18 | C2 | — | 2 | 1 | no | — |
| 19 | C2 | C2×C64 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center, Frattini, cosocle | C64 | C22 |
| commutator, socle | C2 | C2×C64 |
| prime radical | C22 | C64 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C64 ◁ G | |
| LECS | G ▷ C64 ▷ C32 ▷ C16 ▷ C8 ▷ C4 ▷ C2 ▷ C1 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 2. C128 | C2 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C2×C64 | 2 |
| C128 | 2 |