Compare 810 vs 815
| Property | 810 | 815 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 6 | 2 |
| Prime factorization | 21 × 34 × 51 | 51 × 1631 |
| Prime factorization | 2 × 3 × 3 × 3 × 3 × 5 | 5 × 163 |
| Divisors count | 20 | 4 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810 | 1, 5, 163, 815 |
| Number of properties | 0 | 1 |
| Semiprimes | 247th | |
| Roman numberals | DCCCX | DCCCXV |
| Base 2 | 11001010102 | 11001011112 |
| Base 3 | 10100003 | 10100123 |
| Base 4 | 302224 | 302334 |
| Base 5 | 112205 | 112305 |
| Base 6 | 34306 | 34356 |
| Base 7 | 22357 | 22437 |
| Base 8 | 14528 | 14578 |
| Base 9 | 11009 | 11059 |
| Base 10 | 81010 | 81510 |
| Base 11 | 67711 | 68111 |
| Base 12 | 57612 | 57b12 |
| Base 13 | 4a413 | 4a913 |
| Base 14 | 41c14 | 42314 |
| Base 15 | 39015 | 39515 |
| Base 16 | 32a16 | 32f16 |