Compare 21870 vs 21881
| Property | 21870 | 21881 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 9 | 1 |
| Prime factorization | 21 × 37 × 51 | 218811 |
| Prime factorization | 2 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 5 | 21881 |
| Divisors count | 32 | 2 |
| Divisors | 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 405, 486, 729, 810, 1215, 1458, 2187, 2430, 3645, 4374, 7290, 10935, 21870 | 1, 21881 |
| Number of properties | 0 | 4 |
| Chen primes | 1204th | |
| Isolated primes | 1712th | |
| Primes | 2455th | |
| Pythagorean primes | 1217th | |
| Roman numberals | ||
| Base 2 | 1010101011011102 | 1010101011110012 |
| Base 3 | 10100000003 | 10100001023 |
| Base 4 | 111112324 | 111113214 |
| Base 5 | 11444405 | 12000115 |
| Base 6 | 2451306 | 2451456 |
| Base 7 | 1205227 | 1205367 |
| Base 8 | 525568 | 525718 |
| Base 9 | 330009 | 330129 |
| Base 10 | 2187010 | 2188110 |
| Base 11 | 1548211 | 1549211 |
| Base 12 | 107a612 | 107b512 |
| Base 13 | 9c5413 | 9c6213 |
| Base 14 | 7d8214 | 7d8d14 |
| Base 15 | 673015 | 673b15 |
| Base 16 | 556e16 | 557916 |