Groups of order 21
This article gives information about, and links to more details on, groups of order 21
See pages on algebraic structures of order 21 | See pages on groups of a particular order
There are, up to isomorphism, two groups of order 21, indicated in the table below:
| Group | GAP ID (second part) | Abelian? |
|---|---|---|
| Frobenius group: Z7⋊Z3 | 1 | No |
| cyclic group:Z21 | 2 | Yes |
Z7⋊Z3 is the smallest non-abelian group of odd order.