Compare 1681 vs 1686
| Property | 1681 | 1686 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 412 | 21 × 31 × 2811 |
| Prime factorization | 41 × 41 | 2 × 3 × 281 |
| Divisors count | 3 | 8 |
| Divisors | 1, 41, 1681 | 1, 2, 3, 6, 281, 562, 843, 1686 |
| Number of properties | 1 | 0 |
| Semiprimes | 484th | |
| Roman numberals | MDCLXXXI | MDCLXXXVI |
| Base 2 | 110100100012 | 110100101102 |
| Base 3 | 20220213 | 20221103 |
| Base 4 | 1221014 | 1221124 |
| Base 5 | 232115 | 232215 |
| Base 6 | 114416 | 114506 |
| Base 7 | 46217 | 46267 |
| Base 8 | 32218 | 32268 |
| Base 9 | 22679 | 22739 |
| Base 10 | 168110 | 168610 |
| Base 11 | 129911 | 12a311 |
| Base 12 | b8112 | b8612 |
| Base 13 | 9c413 | 9c913 |
| Base 14 | 88114 | 88614 |
| Base 15 | 77115 | 77615 |
| Base 16 | 69116 | 69616 |