Compare 21986 vs 21987
| Property | 21986 | 21987 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 21 × 109931 | 32 × 71 × 3491 |
| Prime factorization | 2 × 10993 | 3 × 3 × 7 × 349 |
| Divisors count | 4 | 12 |
| Divisors | 1, 2, 10993, 21986 | 1, 3, 7, 9, 21, 63, 349, 1047, 2443, 3141, 7329, 21987 |
| Number of properties | 1 | 0 |
| Semiprimes | 5551st | |
| Roman numberals | ||
| Base 2 | 1010101111000102 | 1010101111000112 |
| Base 3 | 10100110223 | 10100111003 |
| Base 4 | 111132024 | 111132034 |
| Base 5 | 12004215 | 12004225 |
| Base 6 | 2454426 | 2454436 |
| Base 7 | 1210467 | 1210507 |
| Base 8 | 527428 | 527438 |
| Base 9 | 331389 | 331409 |
| Base 10 | 2198610 | 2198710 |
| Base 11 | 1557811 | 1557911 |
| Base 12 | 1088212 | 1088312 |
| Base 13 | a01313 | a01413 |
| Base 14 | 802614 | 802714 |
| Base 15 | 67ab15 | 67ac15 |
| Base 16 | 55e216 | 55e316 |