Compare 1656 vs 1661
| Property | 1656 | 1661 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 6 | 2 |
| Prime factorization | 23 × 32 × 231 | 111 × 1511 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 23 | 11 × 151 |
| Divisors count | 24 | 4 |
| Divisors | 1, 2, 3, 4, 6, 8, 9, 12, 18, 23, 24, 36, 46, 69, 72, 92, 138, 184, 207, 276, 414, 552, 828, 1656 | 1, 11, 151, 1661 |
| Number of properties | 0 | 1 |
| Semiprimes | 479th | |
| Roman numberals | MDCLVI | MDCLXI |
| Base 2 | 110011110002 | 110011111012 |
| Base 3 | 20211003 | 20211123 |
| Base 4 | 1213204 | 1213314 |
| Base 5 | 231115 | 231215 |
| Base 6 | 114006 | 114056 |
| Base 7 | 45547 | 45627 |
| Base 8 | 31708 | 31758 |
| Base 9 | 22409 | 22459 |
| Base 10 | 165610 | 166110 |
| Base 11 | 127611 | 128011 |
| Base 12 | b6012 | b6512 |
| Base 13 | 9a513 | 9aa13 |
| Base 14 | 86414 | 86914 |
| Base 15 | 75615 | 75b15 |
| Base 16 | 67816 | 67d16 |