Compare 20978 vs 20981
| Property | 20978 | 20981 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 21 × 171 × 6171 | 209811 |
| Prime factorization | 2 × 17 × 617 | 20981 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 17, 34, 617, 1234, 10489, 20978 | 1, 20981 |
| Number of properties | 0 | 5 |
| Chen primes | 1161st | |
| Good primes | 265th | |
| Primes | 2359th | |
| Pythagorean primes | 1172nd | |
| Twin primes (1st member) | 357th | |
| Roman numberals | ||
| Base 2 | 1010001111100102 | 1010001111101012 |
| Base 3 | 10012022223 | 10012100023 |
| Base 4 | 110133024 | 110133114 |
| Base 5 | 11324035 | 11324115 |
| Base 6 | 2410426 | 2410456 |
| Base 7 | 1151067 | 1151127 |
| Base 8 | 507628 | 507658 |
| Base 9 | 316889 | 317029 |
| Base 10 | 2097810 | 2098110 |
| Base 11 | 1484111 | 1484411 |
| Base 12 | 1018212 | 1018512 |
| Base 13 | 971913 | 971c13 |
| Base 14 | 790614 | 790914 |
| Base 15 | 633815 | 633b15 |
| Base 16 | 51f216 | 51f516 |