Compare 21990 vs 21998
| Property | 21990 | 21998 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 4 | 3 |
| Total factors | 4 | 3 |
| Prime factorization | 21 × 31 × 51 × 7331 | 21 × 171 × 6471 |
| Prime factorization | 2 × 3 × 5 × 733 | 2 × 17 × 647 |
| Divisors count | 16 | 8 |
| Divisors | 1, 2, 3, 5, 6, 10, 15, 30, 733, 1466, 2199, 3665, 4398, 7330, 10995, 21990 | 1, 2, 17, 34, 647, 1294, 10999, 21998 |
| Number of properties | 0 | 0 |
| Roman numberals | ||
| Base 2 | 1010101111001102 | 1010101111011102 |
| Base 3 | 10100111103 | 10100112023 |
| Base 4 | 111132124 | 111132324 |
| Base 5 | 12004305 | 12004435 |
| Base 6 | 2454506 | 2455026 |
| Base 7 | 1210537 | 1210647 |
| Base 8 | 527468 | 527568 |
| Base 9 | 331439 | 331529 |
| Base 10 | 2199010 | 2199810 |
| Base 11 | 1558111 | 1558911 |
| Base 12 | 1088612 | 1089212 |
| Base 13 | a01713 | a02213 |
| Base 14 | 802a14 | 803414 |
| Base 15 | 67b015 | 67b815 |
| Base 16 | 55e616 | 55ee16 |