Compare 4 vs 5

Unique factors11
Total factors21
Prime factorization2251
Prime factorization2 × 25
Divisors count32
Divisors1, 2, 41, 5
Number of properties136
Additive primes 3rd
Bell primes 2nd
Centered square primes 1st
Chen primes 3rd
Class 1+ primes 3rd
Dihedral primes 2nd
Factorial primes 3rd
Fermat primes 2nd
Fibonacci primes 3rd
Good primes 1st
Harmonic primes 1st
Left-truncatable primes 3rd
Multiplicative primes 3rd
Palindromic primes 3rd
Pierpont primes 3rd
Pierpont primes of the 2nd kind 3rd
Primes 3rd
Prime quadruplets (1st member) 1st
Prime quintuplet 2s (1st member) 1st
Prime triplets (1st member) 1st
Proth primes 2nd
Pythagorean primes 1st
Restricted left-truncatable primes 2nd
Right-truncatable primes 3rd
Safe primes 1st
Sexy primes (1st member) 1st
Sexy prime quadrupletss (1st member) 1st
Sexy prime triplets (1st member) 1st
Solinas primes 2nd
Sophie germain primes 3rd
Super primes 2nd
Thabit primes 2nd
Twin primes (1st member) 2nd
Twin primes (2nd member) 1st
Two-sided primes 3rd
Wilson primes 1st
Roman numberalsIVV
Base 210021012
Base 3113123
Base 4104114
Base 545105
Base 64656
Base 74757
Base 84858
Base 94959
Base 10410510
Base 11411511
Base 12412512
Base 13413513
Base 14414514
Base 15415515
Base 16416516
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