Compare 205 vs 209
| Property | 205 | 209 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 411 | 111 × 191 |
| Prime factorization | 5 × 41 | 11 × 19 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 41, 205 | 1, 11, 19, 209 |
| Number of properties | 1 | 1 |
| Semiprimes | 66th | 68th |
| Roman numberals | CCV | CCIX |
| Base 2 | 110011012 | 110100012 |
| Base 3 | 211213 | 212023 |
| Base 4 | 30314 | 31014 |
| Base 5 | 13105 | 13145 |
| Base 6 | 5416 | 5456 |
| Base 7 | 4127 | 4167 |
| Base 8 | 3158 | 3218 |
| Base 9 | 2479 | 2529 |
| Base 10 | 20510 | 20910 |
| Base 11 | 17711 | 18011 |
| Base 12 | 15112 | 15512 |
| Base 13 | 12a13 | 13113 |
| Base 14 | 10914 | 10d14 |
| Base 15 | da15 | de15 |
| Base 16 | cd16 | d116 |