Compare 31 vs 40
Property | 31 | 40 |
---|---|---|
Type | prime | composite number |
Unique factors | 1 | 2 |
Total factors | 1 | 4 |
Prime factorization | 311 | 23 × 51 |
Prime factorization | 31 | 2 × 2 × 2 × 5 |
Divisors count | 2 | 8 |
Divisors | 1, 31 | 1, 2, 4, 5, 8, 10, 20, 40 |
Number of properties | 18 | 0 |
Centered decagonal primes | 2nd | |
Centered triangular primes | 2nd | |
Chen primes | 11th | |
Class 1+ primes | 8th | |
Emirps | 3rd | |
Euclid primes | 4th | |
Happy primes | 5th | |
Lucky primes | 4th | |
Mersenne primes | 3rd | |
Multiplicative primes | 7th | |
Pierpont primes of the 2nd kind | 8th | |
Primes | 11th | |
Right-truncatable primes | 7th | |
Sexy primes (1st member) | 7th | |
Sexy prime triplets (1st member) | 5th | |
Solinas primes | 10th | |
Super primes | 5th | |
Twin primes (2nd member) | 5th | |
Roman numberals | XXXI | XL |
Base 2 | 111112 | 1010002 |
Base 3 | 10113 | 11113 |
Base 4 | 1334 | 2204 |
Base 5 | 1115 | 1305 |
Base 6 | 516 | 1046 |
Base 7 | 437 | 557 |
Base 8 | 378 | 508 |
Base 9 | 349 | 449 |
Base 10 | 3110 | 4010 |
Base 11 | 2911 | 3711 |
Base 12 | 2712 | 3412 |
Base 13 | 2513 | 3113 |
Base 14 | 2314 | 2c14 |
Base 15 | 2115 | 2a15 |
Base 16 | 1f16 | 2816 |