1. Numbers
  2. Compare 81281 vs 81290

Compare 81281 vs 81290

Property8128181290
Typeprimecomposite number
Unique factors14
Total factors14
Prime factorization81281121 × 51 × 111 × 7391
Prime factorization812812 × 5 × 11 × 739
Divisors count216
Divisors1, 812811, 2, 5, 10, 11, 22, 55, 110, 739, 1478, 3695, 7390, 8129, 16258, 40645, 81290
Number of properties70
Centered decagonal primes61st 
Chen primes3597th 
Harmonic primes3002nd 
Primes7953rd 
Pythagorean primes3963rd 
Sophie germain primes988th 
Twin primes (1st member)1025th 
Roman numberals  
Base 2100111101100000012100111101100010102
Base 3110101111023110101112023
Base 410331200141033120224
Base 5101001115101001305
Base 61424145614242026
Base 745565474556667
Base 823660182366128
Base 913344291334529
Base 1081281108129010
Base 1156082115609011
Base 123b055123b06212
Base 132acc5132b00113
Base 142189b14218a614
Base 151913b151914515
Base 1613d811613d8a16
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