Compare 680 vs 685
| Property | 680 | 685 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 23 × 51 × 171 | 51 × 1371 |
| Prime factorization | 2 × 2 × 2 × 5 × 17 | 5 × 137 |
| Divisors count | 16 | 4 |
| Divisors | 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680 | 1, 5, 137, 685 |
| Number of properties | 0 | 1 |
| Semiprimes | 205th | |
| Roman numberals | DCLXXX | DCLXXXV |
| Base 2 | 10101010002 | 10101011012 |
| Base 3 | 2210123 | 2211013 |
| Base 4 | 222204 | 222314 |
| Base 5 | 102105 | 102205 |
| Base 6 | 30526 | 31016 |
| Base 7 | 16617 | 16667 |
| Base 8 | 12508 | 12558 |
| Base 9 | 8359 | 8419 |
| Base 10 | 68010 | 68510 |
| Base 11 | 56911 | 57311 |
| Base 12 | 48812 | 49112 |
| Base 13 | 40413 | 40913 |
| Base 14 | 36814 | 36d14 |
| Base 15 | 30515 | 30a15 |
| Base 16 | 2a816 | 2ad16 |