Compare 1641 vs 1645
| Property | 1641 | 1645 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 31 × 5471 | 51 × 71 × 471 |
| Prime factorization | 3 × 547 | 5 × 7 × 47 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 547, 1641 | 1, 5, 7, 35, 47, 235, 329, 1645 |
| Number of properties | 1 | 0 |
| Semiprimes | 470th | |
| Roman numberals | MDCXLI | MDCXLV |
| Base 2 | 110011010012 | 110011011012 |
| Base 3 | 20202103 | 20202213 |
| Base 4 | 1212214 | 1212314 |
| Base 5 | 230315 | 230405 |
| Base 6 | 113336 | 113416 |
| Base 7 | 45337 | 45407 |
| Base 8 | 31518 | 31558 |
| Base 9 | 22239 | 22279 |
| Base 10 | 164110 | 164510 |
| Base 11 | 126211 | 126611 |
| Base 12 | b4912 | b5112 |
| Base 13 | 99313 | 99713 |
| Base 14 | 85314 | 85714 |
| Base 15 | 74615 | 74a15 |
| Base 16 | 66916 | 66d16 |