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What is the LCM of 84 and 7840?

The lcm of 84 and 7840 is 23520.

Steps to find LCM

  1. Find the prime factorization of 84
    84 = 2 × 2 × 3 × 7
  2. Find the prime factorization of 7840
    7840 = 2 × 2 × 2 × 2 × 2 × 5 × 7 × 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 × 2 × 2 × 3 × 5 × 7 × 7
  4. LCM = 23520

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