What is the LCM of 19 and 20?

The lcm of 19 and 20 is 380.

Steps to find LCM

  1. Find the prime factorization of 19
    19 = 19
  2. Find the prime factorization of 20
    20 = 2 × 2 × 5
  3. Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

    LCM = 2 × 2 × 5 × 19
  4. LCM = 380

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