LCM & GCF Calculator

Find the least common multiple and greatest common factor of two integers.

  • Free to use
  • Takes about 15 seconds
  • Easy

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About this calculator

GCF via Euclidean algorithm; LCM = |a·b| / GCF (for a,b ≠ 0).

Formula: LCM(a,b) = |a·b| / GCF(a,b)

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