1. Numbers
  2. Compare 257 vs 258

Compare 257 vs 258

Property257258
Typeprimecomposite number
Unique factors13
Total factors13
Prime factorization257121 × 31 × 431
Prime factorization2572 × 3 × 43
Divisors count28
Divisors1, 2571, 2, 3, 6, 43, 86, 129, 258
Number of properties160
Chen primes42nd 
Fermat primes4th 
Good primes20th 
Isolated primes22nd 
Long primes21st 
Pierpont primes14th 
Primes55th 
Proth primes10th 
Pythagorean primes25th 
Quartan primes4th 
Sexy primes (1st member)31st 
Sexy primes (2nd member)30th 
Sexy prime quadrupletss (2nd member)5th 
Sexy prime triplets (1st member)16th 
Sexy prime triplets (2nd member)15th 
Solinas primes31st 
Roman numberalsCCLVIICCLVIII
Base 210000000121000000102
Base 310011231001203
Base 4100014100024
Base 52012520135
Base 61105611106
Base 751575167
Base 840184028
Base 931593169
Base 102571025810
Base 112141121511
Base 121951219612
Base 1316a1316b13
Base 141451414614
Base 151221512315
Base 161011610216
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