Compare 1680 vs 1681
| Property | 1680 | 1681 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 4 | 1 |
| Total factors | 7 | 2 |
| Prime factorization | 24 × 31 × 51 × 71 | 412 |
| Prime factorization | 2 × 2 × 2 × 2 × 3 × 5 × 7 | 41 × 41 |
| Divisors count | 40 | 3 |
| 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, 41, 1681 |
| Number of properties | 0 | 1 |
| Semiprimes | 484th | |
| Roman numberals | MDCLXXX | MDCLXXXI |
| Base 2 | 110100100002 | 110100100012 |
| Base 3 | 20220203 | 20220213 |
| Base 4 | 1221004 | 1221014 |
| Base 5 | 232105 | 232115 |
| Base 6 | 114406 | 114416 |
| Base 7 | 46207 | 46217 |
| Base 8 | 32208 | 32218 |
| Base 9 | 22669 | 22679 |
| Base 10 | 168010 | 168110 |
| Base 11 | 129811 | 129911 |
| Base 12 | b8012 | b8112 |
| Base 13 | 9c313 | 9c413 |
| Base 14 | 88014 | 88114 |
| Base 15 | 77015 | 77115 |
| Base 16 | 69016 | 69116 |