Compare 157981 vs 157991
| Property | 157981 | 157991 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 171 × 92931 | 1579911 |
| Prime factorization | 17 × 9293 | 157991 |
| Divisors count | 4 | 2 |
| Divisors | 1, 17, 9293, 157981 | 1, 157991 |
| Number of properties | 1 | 4 |
| Emirps | 3166th | |
| Harmonic primes | 5442nd | |
| Isolated primes | 10951st | |
| Primes | 14520th | |
| Semiprimes | 36116th | |
| Roman numberals | ||
| Base 2 | 1001101001000111012 | 1001101001001001112 |
| Base 3 | 220002010113 | 220002011123 |
| Base 4 | 2122101314 | 2122102134 |
| Base 5 | 200234115 | 200234315 |
| Base 6 | 32152216 | 32152356 |
| Base 7 | 12254057 | 12254217 |
| Base 8 | 4644358 | 4644478 |
| Base 9 | 2606349 | 2606459 |
| Base 10 | 15798110 | 15799110 |
| Base 11 | a876a11 | a877911 |
| Base 12 | 7751112 | 7751b12 |
| Base 13 | 56ba513 | 56bb213 |
| Base 14 | 4180514 | 4181114 |
| Base 15 | 31c2115 | 31c2b15 |
| Base 16 | 2691d16 | 2692716 |