Compare 813 vs 820
| Property | 813 | 820 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 2711 | 22 × 51 × 411 |
| Prime factorization | 3 × 271 | 2 × 2 × 5 × 41 |
| Divisors count | 4 | 12 |
| Divisors | 1, 3, 271, 813 | 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820 |
| Number of properties | 1 | 0 |
| Semiprimes | 246th | |
| Roman numberals | DCCCXIII | DCCCXX |
| Base 2 | 11001011012 | 11001101002 |
| Base 3 | 10100103 | 10101013 |
| Base 4 | 302314 | 303104 |
| Base 5 | 112235 | 112405 |
| Base 6 | 34336 | 34446 |
| Base 7 | 22417 | 22517 |
| Base 8 | 14558 | 14648 |
| Base 9 | 11039 | 11119 |
| Base 10 | 81310 | 82010 |
| Base 11 | 67a11 | 68611 |
| Base 12 | 57912 | 58412 |
| Base 13 | 4a713 | 4b113 |
| Base 14 | 42114 | 42814 |
| Base 15 | 39315 | 39a15 |
| Base 16 | 32d16 | 33416 |