Compare 1561 vs 1568
| Property | 1561 | 1568 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 7 |
| Prime factorization | 71 × 2231 | 25 × 72 |
| Prime factorization | 7 × 223 | 2 × 2 × 2 × 2 × 2 × 7 × 7 |
| Divisors count | 4 | 18 |
| Divisors | 1, 7, 223, 1561 | 1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 98, 112, 196, 224, 392, 784, 1568 |
| Number of properties | 1 | 0 |
| Semiprimes | 453rd | |
| Roman numberals | MDLXI | MDLXVIII |
| Base 2 | 110000110012 | 110001000002 |
| Base 3 | 20102113 | 20110023 |
| Base 4 | 1201214 | 1202004 |
| Base 5 | 222215 | 222335 |
| Base 6 | 111216 | 111326 |
| Base 7 | 43607 | 44007 |
| Base 8 | 30318 | 30408 |
| Base 9 | 21249 | 21329 |
| Base 10 | 156110 | 156810 |
| Base 11 | 119a11 | 11a611 |
| Base 12 | aa112 | aa812 |
| Base 13 | 93113 | 93813 |
| Base 14 | 7d714 | 80014 |
| Base 15 | 6e115 | 6e815 |
| Base 16 | 61916 | 62016 |