Compare 21396 vs 21397
| Property | 21396 | 21397 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 31 × 17831 | 213971 |
| Prime factorization | 2 × 2 × 3 × 1783 | 21397 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 3, 4, 6, 12, 1783, 3566, 5349, 7132, 10698, 21396 | 1, 21397 |
| Number of properties | 0 | 5 |
| Cousin primes (1st member) | 365th | |
| Isolated primes | 1677th | |
| Primes | 2402nd | |
| Pythagorean primes | 1191st | |
| Sexy primes (2nd member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100101002 | 1010011100101012 |
| Base 3 | 10021001103 | 10021001113 |
| Base 4 | 110321104 | 110321114 |
| Base 5 | 11410415 | 11410425 |
| Base 6 | 2430206 | 2430216 |
| Base 7 | 1162447 | 1162457 |
| Base 8 | 516248 | 516258 |
| Base 9 | 323139 | 323149 |
| Base 10 | 2139610 | 2139710 |
| Base 11 | 1509111 | 1509211 |
| Base 12 | 1047012 | 1047112 |
| Base 13 | 997b13 | 997c13 |
| Base 14 | 7b2414 | 7b2514 |
| Base 15 | 651615 | 651715 |
| Base 16 | 539416 | 539516 |