Compare 680 vs 687
| Property | 680 | 687 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 23 × 51 × 171 | 31 × 2291 |
| Prime factorization | 2 × 2 × 2 × 5 × 17 | 3 × 229 |
| Divisors count | 16 | 4 |
| Divisors | 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680 | 1, 3, 229, 687 |
| Number of properties | 0 | 1 |
| Semiprimes | 206th | |
| Roman numberals | DCLXXX | DCLXXXVII |
| Base 2 | 10101010002 | 10101011112 |
| Base 3 | 2210123 | 2211103 |
| Base 4 | 222204 | 222334 |
| Base 5 | 102105 | 102225 |
| Base 6 | 30526 | 31036 |
| Base 7 | 16617 | 20017 |
| Base 8 | 12508 | 12578 |
| Base 9 | 8359 | 8439 |
| Base 10 | 68010 | 68710 |
| Base 11 | 56911 | 57511 |
| Base 12 | 48812 | 49312 |
| Base 13 | 40413 | 40b13 |
| Base 14 | 36814 | 37114 |
| Base 15 | 30515 | 30c15 |
| Base 16 | 2a816 | 2af16 |