Compare 21157 vs 21166
| Property | 21157 | 21166 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 211571 | 21 × 191 × 5571 |
| Prime factorization | 21157 | 2 × 19 × 557 |
| Divisors count | 2 | 8 |
| Divisors | 1, 21157 | 1, 2, 19, 38, 557, 1114, 10583, 21166 |
| Number of properties | 5 | 0 |
| Isolated primes | 1659th | |
| Primes | 2378th | |
| Pythagorean primes | 1181st | |
| Sexy primes (1st member) | 720th | |
| Sexy prime triplets (1st member) | 197th | |
| Roman numberals | ||
| Base 2 | 1010010101001012 | 1010010101011102 |
| Base 3 | 10020001213 | 10020002213 |
| Base 4 | 110222114 | 110222324 |
| Base 5 | 11341125 | 11341315 |
| Base 6 | 2415416 | 2415546 |
| Base 7 | 1154537 | 1154657 |
| Base 8 | 512458 | 512568 |
| Base 9 | 320179 | 320279 |
| Base 10 | 2115710 | 2116610 |
| Base 11 | 1499411 | 149a211 |
| Base 12 | 102b112 | 102ba12 |
| Base 13 | 982613 | 983213 |
| Base 14 | 79d314 | 79dc14 |
| Base 15 | 640715 | 641115 |
| Base 16 | 52a516 | 52ae16 |