Compare 1 vs 21

Property121
Typecomposite numbersemiprime
Unique factors02
Total factors02
Prime factorization31 × 71
Prime factorization3 × 7
Divisors count14
Divisors11, 3, 7, 21
Number of properties01
Semiprimes 7th
Roman numberalsIXXI
Base 212101012
Base 3132103
Base 4141114
Base 515415
Base 616336
Base 717307
Base 818258
Base 919239
Base 101102110
Base 111111a11
Base 121121912
Base 131131813
Base 141141714
Base 151151615
Base 161161516
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