Compare 1661 vs 1672
| Property | 1661 | 1672 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 5 |
| Prime factorization | 111 × 1511 | 23 × 111 × 191 |
| Prime factorization | 11 × 151 | 2 × 2 × 2 × 11 × 19 |
| Divisors count | 4 | 16 |
| Divisors | 1, 11, 151, 1661 | 1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 152, 209, 418, 836, 1672 |
| Number of properties | 1 | 0 |
| Semiprimes | 479th | |
| Roman numberals | MDCLXI | MDCLXXII |
| Base 2 | 110011111012 | 110100010002 |
| Base 3 | 20211123 | 20212213 |
| Base 4 | 1213314 | 1220204 |
| Base 5 | 231215 | 231425 |
| Base 6 | 114056 | 114246 |
| Base 7 | 45627 | 46067 |
| Base 8 | 31758 | 32108 |
| Base 9 | 22459 | 22579 |
| Base 10 | 166110 | 167210 |
| Base 11 | 128011 | 129011 |
| Base 12 | b6512 | b7412 |
| Base 13 | 9aa13 | 9b813 |
| Base 14 | 86914 | 87614 |
| Base 15 | 75b15 | 76715 |
| Base 16 | 67d16 | 68816 |