Compare 1550 vs 1561
| Property | 1550 | 1561 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 21 × 52 × 311 | 71 × 2231 |
| Prime factorization | 2 × 5 × 5 × 31 | 7 × 223 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550 | 1, 7, 223, 1561 |
| Number of properties | 0 | 1 |
| Semiprimes | 453rd | |
| Roman numberals | MDL | MDLXI |
| Base 2 | 110000011102 | 110000110012 |
| Base 3 | 20101023 | 20102113 |
| Base 4 | 1200324 | 1201214 |
| Base 5 | 222005 | 222215 |
| Base 6 | 111026 | 111216 |
| Base 7 | 43437 | 43607 |
| Base 8 | 30168 | 30318 |
| Base 9 | 21129 | 21249 |
| Base 10 | 155010 | 156110 |
| Base 11 | 118a11 | 119a11 |
| Base 12 | a9212 | aa112 |
| Base 13 | 92313 | 93113 |
| Base 14 | 7ca14 | 7d714 |
| Base 15 | 6d515 | 6e115 |
| Base 16 | 60e16 | 61916 |