Compare 253 vs 261
| Property | 253 | 261 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 3 |
| Prime factorization | 111 × 231 | 32 × 291 |
| Prime factorization | 11 × 23 | 3 × 3 × 29 |
| Divisors count | 4 | 6 |
| Divisors | 1, 11, 23, 253 | 1, 3, 9, 29, 87, 261 |
| Number of properties | 1 | 0 |
| Semiprimes | 81st | |
| Roman numberals | CCLIII | CCLXI |
| Base 2 | 111111012 | 1000001012 |
| Base 3 | 1001013 | 1002003 |
| Base 4 | 33314 | 100114 |
| Base 5 | 20035 | 20215 |
| Base 6 | 11016 | 11136 |
| Base 7 | 5117 | 5227 |
| Base 8 | 3758 | 4058 |
| Base 9 | 3119 | 3209 |
| Base 10 | 25310 | 26110 |
| Base 11 | 21011 | 21811 |
| Base 12 | 19112 | 19912 |
| Base 13 | 16613 | 17113 |
| Base 14 | 14114 | 14914 |
| Base 15 | 11d15 | 12615 |
| Base 16 | fd16 | 10516 |