Compare 1981 vs 1992
| Property | 1981 | 1992 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 5 |
| Prime factorization | 71 × 2831 | 23 × 31 × 831 |
| Prime factorization | 7 × 283 | 2 × 2 × 2 × 3 × 83 |
| Divisors count | 4 | 16 |
| Divisors | 1, 7, 283, 1981 | 1, 2, 3, 4, 6, 8, 12, 24, 83, 166, 249, 332, 498, 664, 996, 1992 |
| Number of properties | 1 | 0 |
| Semiprimes | 572nd | |
| Roman numberals | MCMLXXXI | MCMXCII |
| Base 2 | 111101111012 | 111110010002 |
| Base 3 | 22011013 | 22012103 |
| Base 4 | 1323314 | 1330204 |
| Base 5 | 304115 | 304325 |
| Base 6 | 131016 | 131206 |
| Base 7 | 55307 | 55447 |
| Base 8 | 36758 | 37108 |
| Base 9 | 26419 | 26539 |
| Base 10 | 198110 | 199210 |
| Base 11 | 154111 | 155111 |
| Base 12 | 119112 | 11a012 |
| Base 13 | b9513 | ba313 |
| Base 14 | a1714 | a2414 |
| Base 15 | 8c115 | 8cc15 |
| Base 16 | 7bd16 | 7c816 |