Compare 20981 vs 20986
| Property | 20981 | 20986 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 209811 | 21 × 71 × 14991 |
| Prime factorization | 20981 | 2 × 7 × 1499 |
| Divisors count | 2 | 8 |
| Divisors | 1, 20981 | 1, 2, 7, 14, 1499, 2998, 10493, 20986 |
| Number of properties | 5 | 0 |
| Chen primes | 1161st | |
| Good primes | 265th | |
| Primes | 2359th | |
| Pythagorean primes | 1172nd | |
| Twin primes (1st member) | 357th | |
| Roman numberals | ||
| Base 2 | 1010001111101012 | 1010001111110102 |
| Base 3 | 10012100023 | 10012100213 |
| Base 4 | 110133114 | 110133224 |
| Base 5 | 11324115 | 11324215 |
| Base 6 | 2410456 | 2410546 |
| Base 7 | 1151127 | 1151207 |
| Base 8 | 507658 | 507728 |
| Base 9 | 317029 | 317079 |
| Base 10 | 2098110 | 2098610 |
| Base 11 | 1484411 | 1484911 |
| Base 12 | 1018512 | 1018a12 |
| Base 13 | 971c13 | 972413 |
| Base 14 | 790914 | 791014 |
| Base 15 | 633b15 | 634115 |
| Base 16 | 51f516 | 51fa16 |