Compare 21991 vs 21993
Property | 21991 | 21993 |
---|---|---|
Type | prime | semiprime |
Unique factors | 1 | 2 |
Total factors | 1 | 2 |
Prime factorization | 219911 | 31 × 73311 |
Prime factorization | 21991 | 3 × 7331 |
Divisors count | 2 | 4 |
Divisors | 1, 21991 | 1, 3, 7331, 21993 |
Number of properties | 5 | 1 |
Chen primes | 1208th | |
Isolated primes | 1720th | |
Primes | 2463rd | |
Semiprimes | 5553rd | |
Sexy primes (1st member) | 742nd | |
Sexy prime triplets (1st member) | 202nd | |
Roman numberals | ||
Base 2 | 1010101111001112 | 1010101111010012 |
Base 3 | 10100111113 | 10100111203 |
Base 4 | 111132134 | 111132214 |
Base 5 | 12004315 | 12004335 |
Base 6 | 2454516 | 2454536 |
Base 7 | 1210547 | 1210567 |
Base 8 | 527478 | 527518 |
Base 9 | 331449 | 331469 |
Base 10 | 2199110 | 2199310 |
Base 11 | 1558211 | 1558411 |
Base 12 | 1088712 | 1088912 |
Base 13 | a01813 | a01a13 |
Base 14 | 802b14 | 802d14 |
Base 15 | 67b115 | 67b315 |
Base 16 | 55e716 | 55e916 |