Compare 1972 vs 1981
| Property | 1972 | 1981 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 22 × 171 × 291 | 71 × 2831 |
| Prime factorization | 2 × 2 × 17 × 29 | 7 × 283 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 4, 17, 29, 34, 58, 68, 116, 493, 986, 1972 | 1, 7, 283, 1981 |
| Number of properties | 0 | 1 |
| Semiprimes | 572nd | |
| Roman numberals | MCMLXXII | MCMLXXXI |
| Base 2 | 111101101002 | 111101111012 |
| Base 3 | 22010013 | 22011013 |
| Base 4 | 1323104 | 1323314 |
| Base 5 | 303425 | 304115 |
| Base 6 | 130446 | 131016 |
| Base 7 | 55157 | 55307 |
| Base 8 | 36648 | 36758 |
| Base 9 | 26319 | 26419 |
| Base 10 | 197210 | 198110 |
| Base 11 | 153311 | 154111 |
| Base 12 | 118412 | 119112 |
| Base 13 | b8913 | b9513 |
| Base 14 | a0c14 | a1714 |
| Base 15 | 8b715 | 8c115 |
| Base 16 | 7b416 | 7bd16 |