Finite Group DatabasebetaFinite Group DatabasebetaOrder 16.
20 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | Q8 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 2 | D4 | C2 | 1 | 3 | yes | maximal, complemented |
| 3 | C2×C4 | C2 | 1 | 3 | yes | maximal, complemented |
| 4 | C22 | C22 | 1 | 3 | yes | — |
| 5 | C4 | C22 | 1 | 3 | yes | — |
| 6 | C4 | C22 | 1 | 1 | yes | characteristic |
| 7 | C2 | — | 2 | 3 | no | — |
| 8 | C2 | C23 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center | C4 | C22 |
| commutator, Frattini, socle, cosocle | C2 | C23 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C4 ◁ G | |
| LECS | G ▷ C2 ▷ C1 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. Q8 | C2 | semidirect |
| 2. D4 | C2 | semidirect |
| 3. C2×C4 | C2 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| Q8 | 2 |
| D4 | 2 |
| C2×C4 | 2 |