18 groups of order 20028.
| SmallGroups | group |
|---|---|
| (20028, 1) | C3×C4×C1669 #34093579 |
| (20028, 2) | Dic1669⋊C3 #34093580 |
| (20028, 3) | C4×C1669⋊C3 #34093581 |
| (20028, 4) | Dic3×C1669 #34093582 |
| (20028, 5) | C3×Dic1669 #34093583 |
| (20028, 6) | Dic5007 #34093584 |
| (20028, 7) | C22×C3×C1669 #34093585 |
| (20028, 8) | #20269227⋊C3 #34093586 |
| (20028, 9) | C2×D1669⋊C3 #34093587 |
| (20028, 10) | C3×#20269227 #34093588 |
| (20028, 11) | C3⋊#20269227 #34093589 |
| (20028, 12) | D3×D1669 #34093590 |
| (20028, 13) | A4×C1669 #34093591 |
| (20028, 14) | C22⋊(C1669⋊C3) #34093592 |
| (20028, 15) | C22×C1669⋊C3 #34093593 |
| (20028, 16) | C2×C3×D1669 #34093594 |
| (20028, 17) | C2×D3×C1669 #34093595 |
| (20028, 18) | C2×D5007 #34093596 |