Compare 20921 vs 21157
| Property | 20921 | 21157 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 209211 | 211571 |
| Prime factorization | 20921 | 21157 |
| Divisors count | 2 | 2 |
| Divisors | 1, 20921 | 1, 21157 |
| Number of properties | 5 | 5 |
| Harmonic primes | 864th | |
| Isolated primes | 1642nd | 1659th |
| Primes | 2353rd | 2378th |
| Pythagorean primes | 1170th | 1181st |
| Sexy primes (1st member) | 720th | |
| Sexy prime triplets (1st member) | 197th | |
| Sophie germain primes | 339th | |
| Roman numberals | ||
| Base 2 | 1010001101110012 | 1010010101001012 |
| Base 3 | 10012002123 | 10020001213 |
| Base 4 | 110123214 | 110222114 |
| Base 5 | 11321415 | 11341125 |
| Base 6 | 2405056 | 2415416 |
| Base 7 | 1146657 | 1154537 |
| Base 8 | 506718 | 512458 |
| Base 9 | 316259 | 320179 |
| Base 10 | 2092110 | 2115710 |
| Base 11 | 1479a11 | 1499411 |
| Base 12 | 1013512 | 102b112 |
| Base 13 | 96a413 | 982613 |
| Base 14 | 78a514 | 79d314 |
| Base 15 | 62eb15 | 640715 |
| Base 16 | 51b916 | 52a516 |