Compare 381 vs 390
| Property | 381 | 390 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 4 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 1271 | 21 × 31 × 51 × 131 |
| Prime factorization | 3 × 127 | 2 × 3 × 5 × 13 |
| Divisors count | 4 | 16 |
| Divisors | 1, 3, 127, 381 | 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390 |
| Number of properties | 1 | 0 |
| Semiprimes | 119th | |
| Roman numberals | CCCLXXXI | CCCXC |
| Base 2 | 1011111012 | 1100001102 |
| Base 3 | 1120103 | 1121103 |
| Base 4 | 113314 | 120124 |
| Base 5 | 30115 | 30305 |
| Base 6 | 14336 | 14506 |
| Base 7 | 10537 | 10657 |
| Base 8 | 5758 | 6068 |
| Base 9 | 4639 | 4739 |
| Base 10 | 38110 | 39010 |
| Base 11 | 31711 | 32511 |
| Base 12 | 27912 | 28612 |
| Base 13 | 23413 | 24013 |
| Base 14 | 1d314 | 1dc14 |
| Base 15 | 1a615 | 1b015 |
| Base 16 | 17d16 | 18616 |