Compare 1561 vs 1564
| Property | 1561 | 1564 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 71 × 2231 | 22 × 171 × 231 |
| Prime factorization | 7 × 223 | 2 × 2 × 17 × 23 |
| Divisors count | 4 | 12 |
| Divisors | 1, 7, 223, 1561 | 1, 2, 4, 17, 23, 34, 46, 68, 92, 391, 782, 1564 |
| Number of properties | 1 | 0 |
| Semiprimes | 453rd | |
| Roman numberals | MDLXI | MDLXIV |
| Base 2 | 110000110012 | 110000111002 |
| Base 3 | 20102113 | 20102213 |
| Base 4 | 1201214 | 1201304 |
| Base 5 | 222215 | 222245 |
| Base 6 | 111216 | 111246 |
| Base 7 | 43607 | 43637 |
| Base 8 | 30318 | 30348 |
| Base 9 | 21249 | 21279 |
| Base 10 | 156110 | 156410 |
| Base 11 | 119a11 | 11a211 |
| Base 12 | aa112 | aa412 |
| Base 13 | 93113 | 93413 |
| Base 14 | 7d714 | 7da14 |
| Base 15 | 6e115 | 6e415 |
| Base 16 | 61916 | 61c16 |