Compare 8 vs 21
Property | 8 | 21 |
---|---|---|
Type | composite number | semiprime |
Unique factors | 1 | 2 |
Total factors | 3 | 2 |
Prime factorization | 23 | 31 × 71 |
Prime factorization | 2 × 2 × 2 | 3 × 7 |
Divisors count | 4 | 4 |
Divisors | 1, 2, 4, 8 | 1, 3, 7, 21 |
Number of properties | 0 | 1 |
Semiprimes | 7th | |
Roman numberals | VIII | XXI |
Base 2 | 10002 | 101012 |
Base 3 | 223 | 2103 |
Base 4 | 204 | 1114 |
Base 5 | 135 | 415 |
Base 6 | 126 | 336 |
Base 7 | 117 | 307 |
Base 8 | 108 | 258 |
Base 9 | 89 | 239 |
Base 10 | 810 | 2110 |
Base 11 | 811 | 1a11 |
Base 12 | 812 | 1912 |
Base 13 | 813 | 1813 |
Base 14 | 814 | 1714 |
Base 15 | 815 | 1615 |
Base 16 | 816 | 1516 |