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What is the LCM of 40 and 56?

The lcm of 40 and 56 is 280.

Steps to find LCM

  1. Find the prime factorization of 40
    40 = 2 × 2 × 2 × 5
  2. Find the prime factorization of 56
    56 = 2 × 2 × 2 × 7
  3. Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

    LCM = 2 × 2 × 2 × 5 × 7
  4. LCM = 280

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