Compare 1281 vs 1290
| Property | 1281 | 1290 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 4 |
| Total factors | 3 | 4 |
| Prime factorization | 31 × 71 × 611 | 21 × 31 × 51 × 431 |
| Prime factorization | 3 × 7 × 61 | 2 × 3 × 5 × 43 |
| Divisors count | 8 | 16 |
| Divisors | 1, 3, 7, 21, 61, 183, 427, 1281 | 1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290 |
| Number of properties | 0 | 0 |
| Roman numberals | MCCLXXXI | MCCXC |
| Base 2 | 101000000012 | 101000010102 |
| Base 3 | 12021103 | 12022103 |
| Base 4 | 1100014 | 1100224 |
| Base 5 | 201115 | 201305 |
| Base 6 | 55336 | 55506 |
| Base 7 | 35107 | 35227 |
| Base 8 | 24018 | 24128 |
| Base 9 | 16739 | 16839 |
| Base 10 | 128110 | 129010 |
| Base 11 | a6511 | a7311 |
| Base 12 | 8a912 | 8b612 |
| Base 13 | 77713 | 78313 |
| Base 14 | 67714 | 68214 |
| Base 15 | 5a615 | 5b015 |
| Base 16 | 50116 | 50a16 |