Compare 21 vs 41

Unique factors21
Total factors21
Prime factorization31 × 71411
Prime factorization3 × 741
Divisors count42
Divisors1, 3, 7, 211, 41
Number of properties118
Additive primes 8th
Centered square primes 3rd
Chen primes 13th
Cousin primes (2nd member) 5th
Good primes 6th
Harmonic primes 5th
Primes 13th
Prime triplets (1st member) 7th
Prime triplets (2nd member) 6th
Proth primes 5th
Pythagorean primes 6th
Sexy primes (1st member) 9th
Sexy prime quadrupletss (1st member) 3rd
Sexy prime triplets (1st member) 6th
Solinas primes 12th
Sophie germain primes 7th
Super primes 6th
Twin primes (1st member) 6th
Roman numberalsXXIXLI
Base 21010121010012
Base 3210311123
Base 411142214
Base 54151315
Base 63361056
Base 7307567
Base 8258518
Base 9239459
Base 1021104110
Base 111a113811
Base 1219123512
Base 1318133213
Base 1417142d14
Base 1516152b15
Base 1615162916
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