15 groups of order 21256.
| SmallGroups | group |
|---|---|
| (21256, 1) | C8×C2657 #36318457 |
| (21256, 2) | C2×C4×C2657 #36318458 |
| (21256, 3) | D4×C2657 #36318459 |
| (21256, 4) | Q8×C2657 #36318460 |
| (21256, 5) | C23×C2657 #36318461 |
| (21256, 6) | #36318462 |
| (21256, 7) | C4×D2657 #36318463 |
| (21256, 8) | C2×Dic2657 #36318464 |
| (21256, 9) | C22⋊D2657 #36318465 |
| (21256, 10) | D10628 #36318466 |
| (21256, 11) | Dic5314 #36318467 |
| (21256, 12) | C22×D2657 #36318468 |
| (21256, 13) | #36318469 |
| (21256, 14) | C2×#24922332 #36318470 |
| (21256, 15) | #36318471 |