Compare 381 vs 391
| Property | 381 | 391 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 1271 | 171 × 231 |
| Prime factorization | 3 × 127 | 17 × 23 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 127, 381 | 1, 17, 23, 391 |
| Number of properties | 1 | 1 |
| Semiprimes | 119th | 122nd |
| Roman numberals | CCCLXXXI | CCCXCI |
| Base 2 | 1011111012 | 1100001112 |
| Base 3 | 1120103 | 1121113 |
| Base 4 | 113314 | 120134 |
| Base 5 | 30115 | 30315 |
| Base 6 | 14336 | 14516 |
| Base 7 | 10537 | 10667 |
| Base 8 | 5758 | 6078 |
| Base 9 | 4639 | 4749 |
| Base 10 | 38110 | 39110 |
| Base 11 | 31711 | 32611 |
| Base 12 | 27912 | 28712 |
| Base 13 | 23413 | 24113 |
| Base 14 | 1d314 | 1dd14 |
| Base 15 | 1a615 | 1b115 |
| Base 16 | 17d16 | 18716 |