Compare 21987 vs 21999
| Property | 21987 | 21999 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 32 × 71 × 3491 | 31 × 73331 |
| Prime factorization | 3 × 3 × 7 × 349 | 3 × 7333 |
| Divisors count | 12 | 4 |
| Divisors | 1, 3, 7, 9, 21, 63, 349, 1047, 2443, 3141, 7329, 21987 | 1, 3, 7333, 21999 |
| Number of properties | 0 | 1 |
| Semiprimes | 5554th | |
| Roman numberals | ||
| Base 2 | 1010101111000112 | 1010101111011112 |
| Base 3 | 10100111003 | 10100112103 |
| Base 4 | 111132034 | 111132334 |
| Base 5 | 12004225 | 12004445 |
| Base 6 | 2454436 | 2455036 |
| Base 7 | 1210507 | 1210657 |
| Base 8 | 527438 | 527578 |
| Base 9 | 331409 | 331539 |
| Base 10 | 2198710 | 2199910 |
| Base 11 | 1557911 | 1558a11 |
| Base 12 | 1088312 | 1089312 |
| Base 13 | a01413 | a02313 |
| Base 14 | 802714 | 803514 |
| Base 15 | 67ac15 | 67b915 |
| Base 16 | 55e316 | 55ef16 |