Compare 1815 vs 1818
| Property | 1815 | 1818 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 4 | 4 |
| Prime factorization | 31 × 51 × 112 | 21 × 32 × 1011 |
| Prime factorization | 3 × 5 × 11 × 11 | 2 × 3 × 3 × 101 |
| Divisors count | 12 | 12 |
| Divisors | 1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815 | 1, 2, 3, 6, 9, 18, 101, 202, 303, 606, 909, 1818 |
| Number of properties | 0 | 0 |
| Roman numberals | MDCCCXV | MDCCCXVIII |
| Base 2 | 111000101112 | 111000110102 |
| Base 3 | 21110203 | 21111003 |
| Base 4 | 1301134 | 1301224 |
| Base 5 | 242305 | 242335 |
| Base 6 | 122236 | 122306 |
| Base 7 | 52027 | 52057 |
| Base 8 | 34278 | 34328 |
| Base 9 | 24369 | 24409 |
| Base 10 | 181510 | 181810 |
| Base 11 | 140011 | 140311 |
| Base 12 | 107312 | 107612 |
| Base 13 | a9813 | a9b13 |
| Base 14 | 93914 | 93c14 |
| Base 15 | 81015 | 81315 |
| Base 16 | 71716 | 71a16 |