Compare 1561 vs 1585
| Property | 1561 | 1585 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 71 × 2231 | 51 × 3171 |
| Prime factorization | 7 × 223 | 5 × 317 |
| Divisors count | 4 | 4 |
| Divisors | 1, 7, 223, 1561 | 1, 5, 317, 1585 |
| Number of properties | 1 | 1 |
| Semiprimes | 453rd | 459th |
| Roman numberals | MDLXI | MDLXXXV |
| Base 2 | 110000110012 | 110001100012 |
| Base 3 | 20102113 | 20112013 |
| Base 4 | 1201214 | 1203014 |
| Base 5 | 222215 | 223205 |
| Base 6 | 111216 | 112016 |
| Base 7 | 43607 | 44237 |
| Base 8 | 30318 | 30618 |
| Base 9 | 21249 | 21519 |
| Base 10 | 156110 | 158510 |
| Base 11 | 119a11 | 121111 |
| Base 12 | aa112 | b0112 |
| Base 13 | 93113 | 94c13 |
| Base 14 | 7d714 | 81314 |
| Base 15 | 6e115 | 70a15 |
| Base 16 | 61916 | 63116 |