Compare 21961 vs 21966
| Property | 21961 | 21966 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 4 |
| Total factors | 1 | 4 |
| Prime factorization | 219611 | 21 × 31 × 71 × 5231 |
| Prime factorization | 21961 | 2 × 3 × 7 × 523 |
| Divisors count | 2 | 16 |
| Divisors | 1, 21961 | 1, 2, 3, 6, 7, 14, 21, 42, 523, 1046, 1569, 3138, 3661, 7322, 10983, 21966 |
| Number of properties | 5 | 0 |
| Additive primes | 1139th | |
| Chen primes | 1206th | |
| Isolated primes | 1718th | |
| Primes | 2461st | |
| Pythagorean primes | 1221st | |
| Roman numberals | ||
| Base 2 | 1010101110010012 | 1010101110011102 |
| Base 3 | 10100101013 | 10100101203 |
| Base 4 | 111130214 | 111130324 |
| Base 5 | 12003215 | 12003315 |
| Base 6 | 2454016 | 2454106 |
| Base 7 | 1210127 | 1210207 |
| Base 8 | 527118 | 527168 |
| Base 9 | 331119 | 331169 |
| Base 10 | 2196110 | 2196610 |
| Base 11 | 1555511 | 1555a11 |
| Base 12 | 1086112 | 1086612 |
| Base 13 | 9cc413 | 9cc913 |
| Base 14 | 800914 | 801014 |
| Base 15 | 679115 | 679615 |
| Base 16 | 55c916 | 55ce16 |