11 groups of order 21987.
| SmallGroups | group |
|---|---|
| (21987, 1) | C7×C9×C349 #36347106 |
| (21987, 2) | C7⋊C9×C349 #36347107 |
| (21987, 3) | C7×C349⋊C9 #36347108 |
| (21987, 4) | #36347109 |
| (21987, 5) | #36347110 |
| (21987, 6) | C32×C7×C349 #36347111 |
| (21987, 7) | ΓL(1,𝔽8)×C349⋊C3 #36347112 |
| (21987, 8) | C3×C7×C349⋊C3 #36347113 |
| (21987, 9) | C3×ΓL(1,𝔽8)×C349 #36347114 |
| (21987, 10) | C3×#20301080 #36347115 |
| (21987, 11) | C3×#20301081 #36347116 |