Compare 21821 vs 21826
| Property | 21821 | 21826 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 218211 | 21 × 71 × 15591 |
| Prime factorization | 21821 | 2 × 7 × 1559 |
| Divisors count | 2 | 8 |
| Divisors | 1, 21821 | 1, 2, 7, 14, 1559, 3118, 10913, 21826 |
| Number of properties | 6 | 0 |
| Chen primes | 1201st | |
| Cousin primes (2nd member) | 372nd | |
| Isolated primes | 1707th | |
| Long primes | 926th | |
| Primes | 2448th | |
| Pythagorean primes | 1215th | |
| Roman numberals | ||
| Base 2 | 1010101001111012 | 1010101010000102 |
| Base 3 | 10022210123 | 10022211013 |
| Base 4 | 111103314 | 111110024 |
| Base 5 | 11442415 | 11443015 |
| Base 6 | 2450056 | 2450146 |
| Base 7 | 1204227 | 1204307 |
| Base 8 | 524758 | 525028 |
| Base 9 | 328359 | 328419 |
| Base 10 | 2182110 | 2182610 |
| Base 11 | 1543811 | 1544211 |
| Base 12 | 1076512 | 1076a12 |
| Base 13 | 9c1713 | 9c1c13 |
| Base 14 | 7d4914 | 7d5014 |
| Base 15 | 66eb15 | 670115 |
| Base 16 | 553d16 | 554216 |