Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » LCM of two numbers

What is the LCM of 686 and 420?

The lcm of 686 and 420 is 20580.

Steps to find LCM

  1. Find the prime factorization of 686
    686 = 2 × 7 × 7 × 7
  2. Find the prime factorization of 420
    420 = 2 × 2 × 3 × 5 × 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 × 3 × 5 × 7 × 7 × 7
  4. LCM = 20580

MathStep (Works offline)

Download our mobile app and learn how to find LCM of upto four numbers in your own time:
Android and iPhone/ iPad

Find least common multiple (lcm) of:

LCM Calculator

Enter two numbers separate by comma. To find lcm of more than two numbers, click here.

© everydaycalculation.com