Compare 21987 vs 21998
| Property | 21987 | 21998 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 4 | 3 |
| Prime factorization | 32 × 71 × 3491 | 21 × 171 × 6471 |
| Prime factorization | 3 × 3 × 7 × 349 | 2 × 17 × 647 |
| Divisors count | 12 | 8 |
| Divisors | 1, 3, 7, 9, 21, 63, 349, 1047, 2443, 3141, 7329, 21987 | 1, 2, 17, 34, 647, 1294, 10999, 21998 |
| Number of properties | 0 | 0 |
| Roman numberals | ||
| Base 2 | 1010101111000112 | 1010101111011102 |
| Base 3 | 10100111003 | 10100112023 |
| Base 4 | 111132034 | 111132324 |
| Base 5 | 12004225 | 12004435 |
| Base 6 | 2454436 | 2455026 |
| Base 7 | 1210507 | 1210647 |
| Base 8 | 527438 | 527568 |
| Base 9 | 331409 | 331529 |
| Base 10 | 2198710 | 2199810 |
| Base 11 | 1557911 | 1558911 |
| Base 12 | 1088312 | 1089212 |
| Base 13 | a01413 | a02213 |
| Base 14 | 802714 | 803414 |
| Base 15 | 67ac15 | 67b815 |
| Base 16 | 55e316 | 55ee16 |