Compare 21391 vs 21403
| Property | 21391 | 21403 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 213911 | 171 × 12591 |
| Prime factorization | 21391 | 17 × 1259 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21391 | 1, 17, 1259, 21403 |
| Number of properties | 3 | 1 |
| Isolated primes | 1676th | |
| Primes | 2401st | |
| Semiprimes | 5421st | |
| Sexy primes (1st member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100110112 |
| Base 3 | 10021000213 | 10021002013 |
| Base 4 | 110320334 | 110321234 |
| Base 5 | 11410315 | 11411035 |
| Base 6 | 2430116 | 2430316 |
| Base 7 | 1162367 | 1162547 |
| Base 8 | 516178 | 516338 |
| Base 9 | 323079 | 323219 |
| Base 10 | 2139110 | 2140310 |
| Base 11 | 1508711 | 1509811 |
| Base 12 | 1046712 | 1047712 |
| Base 13 | 997613 | 998513 |
| Base 14 | 7b1d14 | 7b2b14 |
| Base 15 | 651115 | 651d15 |
| Base 16 | 538f16 | 539b16 |