1. Numbers
  2. Compare 1280 vs 1291

Compare 1280 vs 1291

Property12801291
Typecomposite numberprime
Unique factors21
Total factors91
Prime factorization28 × 5112911
Prime factorization2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 51291
Divisors count182
Divisors1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 12801, 1291
Number of properties09
Additive primes 113th
Chen primes 137th
Harmonic primes 73rd
Long primes 80th
Lucky primes 54th
Primes 210th
Sexy primes (1st member) 91st
Sexy prime triplets (1st member) 35th
Twin primes (2nd member) 44th
Roman numberalsMCCLXXXMCCXCI
Base 2101000000002101000010112
Base 31202102312022113
Base 411000041100234
Base 5201105201315
Base 65532655516
Base 73506735237
Base 82400824138
Base 91672916849
Base 10128010129110
Base 11a6411a7411
Base 128a8128b712
Base 137761378413
Base 146761468314
Base 155a5155b115
Base 165001650b16
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