Compare 21803 vs 21805
| Property | 21803 | 21805 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 4 |
| Prime factorization | 218031 | 51 × 72 × 891 |
| Prime factorization | 21803 | 5 × 7 × 7 × 89 |
| Divisors count | 2 | 12 |
| Divisors | 1, 21803 | 1, 5, 7, 35, 49, 89, 245, 445, 623, 3115, 4361, 21805 |
| Number of properties | 5 | 0 |
| Cousin primes (2nd member) | 371st | |
| Harmonic primes | 900th | |
| Isolated primes | 1705th | |
| Primes | 2446th | |
| Sophie germain primes | 353rd | |
| Roman numberals | ||
| Base 2 | 1010101001010112 | 1010101001011012 |
| Base 3 | 10022201123 | 10022201213 |
| Base 4 | 111102234 | 111102314 |
| Base 5 | 11442035 | 11442105 |
| Base 6 | 2445356 | 2445416 |
| Base 7 | 1203657 | 1204007 |
| Base 8 | 524538 | 524558 |
| Base 9 | 328159 | 328179 |
| Base 10 | 2180310 | 2180510 |
| Base 11 | 1542111 | 1542311 |
| Base 12 | 1074b12 | 1075112 |
| Base 13 | 9c0213 | 9c0413 |
| Base 14 | 7d3514 | 7d3714 |
| Base 15 | 66d815 | 66da15 |
| Base 16 | 552b16 | 552d16 |