Compare 1680 vs 1687
| Property | 1680 | 1687 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 4 | 2 |
| Total factors | 7 | 2 |
| Prime factorization | 24 × 31 × 51 × 71 | 71 × 2411 |
| Prime factorization | 2 × 2 × 2 × 2 × 3 × 5 × 7 | 7 × 241 |
| Divisors count | 40 | 4 |
| Divisors | 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680 | 1, 7, 241, 1687 |
| Number of properties | 0 | 1 |
| Semiprimes | 486th | |
| Roman numberals | MDCLXXX | MDCLXXXVII |
| Base 2 | 110100100002 | 110100101112 |
| Base 3 | 20220203 | 20221113 |
| Base 4 | 1221004 | 1221134 |
| Base 5 | 232105 | 232225 |
| Base 6 | 114406 | 114516 |
| Base 7 | 46207 | 46307 |
| Base 8 | 32208 | 32278 |
| Base 9 | 22669 | 22749 |
| Base 10 | 168010 | 168710 |
| Base 11 | 129811 | 12a411 |
| Base 12 | b8012 | b8712 |
| Base 13 | 9c313 | 9ca13 |
| Base 14 | 88014 | 88714 |
| Base 15 | 77015 | 77715 |
| Base 16 | 69016 | 69716 |