Compare 21157 vs 21161
| Property | 21157 | 21161 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 211571 | 71 × 30231 |
| Prime factorization | 21157 | 7 × 3023 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21157 | 1, 7, 3023, 21161 |
| Number of properties | 5 | 1 |
| Isolated primes | 1659th | |
| Primes | 2378th | |
| Pythagorean primes | 1181st | |
| Semiprimes | 5364th | |
| Sexy primes (1st member) | 720th | |
| Sexy prime triplets (1st member) | 197th | |
| Roman numberals | ||
| Base 2 | 1010010101001012 | 1010010101010012 |
| Base 3 | 10020001213 | 10020002023 |
| Base 4 | 110222114 | 110222214 |
| Base 5 | 11341125 | 11341215 |
| Base 6 | 2415416 | 2415456 |
| Base 7 | 1154537 | 1154607 |
| Base 8 | 512458 | 512518 |
| Base 9 | 320179 | 320229 |
| Base 10 | 2115710 | 2116110 |
| Base 11 | 1499411 | 1499811 |
| Base 12 | 102b112 | 102b512 |
| Base 13 | 982613 | 982a13 |
| Base 14 | 79d314 | 79d714 |
| Base 15 | 640715 | 640b15 |
| Base 16 | 52a516 | 52a916 |