Compare 20915 vs 20921
| Property | 20915 | 20921 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 51 × 471 × 891 | 209211 |
| Prime factorization | 5 × 47 × 89 | 20921 |
| Divisors count | 8 | 2 |
| Divisors | 1, 5, 47, 89, 235, 445, 4183, 20915 | 1, 20921 |
| Number of properties | 0 | 5 |
| Harmonic primes | 864th | |
| Isolated primes | 1642nd | |
| Primes | 2353rd | |
| Pythagorean primes | 1170th | |
| Sophie germain primes | 339th | |
| Roman numberals | ||
| Base 2 | 1010001101100112 | 1010001101110012 |
| Base 3 | 10012001223 | 10012002123 |
| Base 4 | 110123034 | 110123214 |
| Base 5 | 11321305 | 11321415 |
| Base 6 | 2404556 | 2405056 |
| Base 7 | 1146567 | 1146657 |
| Base 8 | 506638 | 506718 |
| Base 9 | 316189 | 316259 |
| Base 10 | 2091510 | 2092110 |
| Base 11 | 1479411 | 1479a11 |
| Base 12 | 1012b12 | 1013512 |
| Base 13 | 969b13 | 96a413 |
| Base 14 | 789d14 | 78a514 |
| Base 15 | 62e515 | 62eb15 |
| Base 16 | 51b316 | 51b916 |