Compare 21379 vs 21381
| Property | 21379 | 21381 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 213791 | 31 × 71271 |
| Prime factorization | 21379 | 3 × 7127 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21379 | 1, 3, 7127, 21381 |
| Number of properties | 7 | 1 |
| Chen primes | 1178th | |
| Cousin primes (1st member) | 364th | |
| Harmonic primes | 880th | |
| Primes | 2399th | |
| Prime triplets (2nd member) | 181st | |
| Semiprimes | 5417th | |
| Super primes | 357th | |
| Twin primes (2nd member) | 363rd | |
| Roman numberals | ||
| Base 2 | 1010011100000112 | 1010011100001012 |
| Base 3 | 10020222113 | 10020222203 |
| Base 4 | 110320034 | 110320114 |
| Base 5 | 11410045 | 11410115 |
| Base 6 | 2425516 | 2425536 |
| Base 7 | 1162217 | 1162237 |
| Base 8 | 516038 | 516058 |
| Base 9 | 322849 | 322869 |
| Base 10 | 2137910 | 2138110 |
| Base 11 | 1507611 | 1507811 |
| Base 12 | 1045712 | 1045912 |
| Base 13 | 996713 | 996913 |
| Base 14 | 7b1114 | 7b1314 |
| Base 15 | 650415 | 650615 |
| Base 16 | 538316 | 538516 |