Compare 1812 vs 1821
| Property | 1812 | 1821 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 22 × 31 × 1511 | 31 × 6071 |
| Prime factorization | 2 × 2 × 3 × 151 | 3 × 607 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 3, 4, 6, 12, 151, 302, 453, 604, 906, 1812 | 1, 3, 607, 1821 |
| Number of properties | 0 | 1 |
| Semiprimes | 524th | |
| Roman numberals | MDCCCXII | MDCCCXXI |
| Base 2 | 111000101002 | 111000111012 |
| Base 3 | 21110103 | 21111103 |
| Base 4 | 1301104 | 1301314 |
| Base 5 | 242225 | 242415 |
| Base 6 | 122206 | 122336 |
| Base 7 | 51667 | 52117 |
| Base 8 | 34248 | 34358 |
| Base 9 | 24339 | 24439 |
| Base 10 | 181210 | 182110 |
| Base 11 | 13a811 | 140611 |
| Base 12 | 107012 | 107912 |
| Base 13 | a9513 | aa113 |
| Base 14 | 93614 | 94114 |
| Base 15 | 80c15 | 81615 |
| Base 16 | 71416 | 71d16 |