1. Numbers
  2. Compare 1811 vs 1820

Compare 1811 vs 1820

Property18111820
Typeprimecomposite number
Unique factors14
Total factors15
Prime factorization1811122 × 51 × 71 × 131
Prime factorization18112 × 2 × 5 × 7 × 13
Divisors count224
Divisors1, 18111, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820
Number of properties80
Additive primes149th 
Dihedral primes7th 
Emirps87th 
Harmonic primes100th 
Isolated primes169th 
Long primes109th 
Primes280th 
Sophie germain primes56th 
Roman numberalsMDCCCXIMDCCCXX
Base 2111000100112111000111002
Base 32111002321111023
Base 413010341301304
Base 5242215242405
Base 6122156122326
Base 75165752107
Base 83423834348
Base 92432924429
Base 10181110182010
Base 1113a711140511
Base 12106b12107812
Base 13a9413aa013
Base 149351494014
Base 1580b1581515
Base 167131671c16
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