Compare 21971 vs 21977
| Property | 21971 | 21977 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 1271 × 1731 | 219771 |
| Prime factorization | 127 × 173 | 21977 |
| Divisors count | 4 | 2 |
| Divisors | 1, 127, 173, 21971 | 1, 21977 |
| Number of properties | 1 | 6 |
| Chen primes | 1207th | |
| Harmonic primes | 906th | |
| Isolated primes | 1719th | |
| Long primes | 931st | |
| Primes | 2462nd | |
| Pythagorean primes | 1222nd | |
| Semiprimes | 5547th | |
| Roman numberals | ||
| Base 2 | 1010101110100112 | 1010101110110012 |
| Base 3 | 10100102023 | 10100102223 |
| Base 4 | 111131034 | 111131214 |
| Base 5 | 12003415 | 12004025 |
| Base 6 | 2454156 | 2454256 |
| Base 7 | 1210257 | 1210347 |
| Base 8 | 527238 | 527318 |
| Base 9 | 331229 | 331289 |
| Base 10 | 2197110 | 2197710 |
| Base 11 | 1556411 | 1556a11 |
| Base 12 | 1086b12 | 1087512 |
| Base 13 | a00113 | a00713 |
| Base 14 | 801514 | 801b14 |
| Base 15 | 679b15 | 67a215 |
| Base 16 | 55d316 | 55d916 |