Compare 1554 vs 1561
| Property | 1554 | 1561 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 4 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 21 × 31 × 71 × 371 | 71 × 2231 |
| Prime factorization | 2 × 3 × 7 × 37 | 7 × 223 |
| Divisors count | 16 | 4 |
| Divisors | 1, 2, 3, 6, 7, 14, 21, 37, 42, 74, 111, 222, 259, 518, 777, 1554 | 1, 7, 223, 1561 |
| Number of properties | 0 | 1 |
| Semiprimes | 453rd | |
| Roman numberals | MDLIV | MDLXI |
| Base 2 | 110000100102 | 110000110012 |
| Base 3 | 20101203 | 20102113 |
| Base 4 | 1201024 | 1201214 |
| Base 5 | 222045 | 222215 |
| Base 6 | 111106 | 111216 |
| Base 7 | 43507 | 43607 |
| Base 8 | 30228 | 30318 |
| Base 9 | 21169 | 21249 |
| Base 10 | 155410 | 156110 |
| Base 11 | 119311 | 119a11 |
| Base 12 | a9612 | aa112 |
| Base 13 | 92713 | 93113 |
| Base 14 | 7d014 | 7d714 |
| Base 15 | 6d915 | 6e115 |
| Base 16 | 61216 | 61916 |