Compare 1561 vs 1572
| Property | 1561 | 1572 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 71 × 2231 | 22 × 31 × 1311 |
| Prime factorization | 7 × 223 | 2 × 2 × 3 × 131 |
| Divisors count | 4 | 12 |
| Divisors | 1, 7, 223, 1561 | 1, 2, 3, 4, 6, 12, 131, 262, 393, 524, 786, 1572 |
| Number of properties | 1 | 0 |
| Semiprimes | 453rd | |
| Roman numberals | MDLXI | MDLXXII |
| Base 2 | 110000110012 | 110001001002 |
| Base 3 | 20102113 | 20110203 |
| Base 4 | 1201214 | 1202104 |
| Base 5 | 222215 | 222425 |
| Base 6 | 111216 | 111406 |
| Base 7 | 43607 | 44047 |
| Base 8 | 30318 | 30448 |
| Base 9 | 21249 | 21369 |
| Base 10 | 156110 | 157210 |
| Base 11 | 119a11 | 11aa11 |
| Base 12 | aa112 | ab012 |
| Base 13 | 93113 | 93c13 |
| Base 14 | 7d714 | 80414 |
| Base 15 | 6e115 | 6ec15 |
| Base 16 | 61916 | 62416 |