約数、約数表、約数一覧、約数早見表
28までの約数表
| 数 | 約数 |
|---|---|
| 1 | 1 |
| 2 | 1 2 |
| 3 | 1 3 |
| 4 | 1 2 4 |
| 5 | 1 5 |
| 6 | 1 2 3 6 |
| 7 | 1 7 |
| 8 | 1 2 4 8 |
| 9 | 1 3 9 |
| 10 | 1 2 5 10 |
| 11 | 1 11 |
| 12 | 1 2 3 4 6 12 |
| 13 | 1 13 |
| 14 | 1 2 7 14 |
| 15 | 1 3 5 15 |
| 16 | 1 2 4 8 16 |
| 17 | 1 17 |
| 18 | 1 2 3 6 9 18 |
| 19 | 1 19 |
| 20 | 1 2 4 5 10 20 |
| 21 | 1 3 7 21 |
| 22 | 1 2 11 22 |
| 23 | 1 23 |
| 24 | 1 2 3 4 6 8 12 24 |
| 25 | 1 5 25 |
| 26 | 1 2 13 26 |
| 27 | 1 3 9 27 |
| 28 | 1 2 4 7 14 28 |