What is the LCM of 10 and 20?
The LCM of 10 and 20 is 20.
Steps to find LCM
- Find the prime factorization of 10
10 = 2 × 5 - Find the prime factorization of 20
20 = 2 × 2 × 5 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 2 × 2 × 5 - LCM = 20
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: 20 & 40 5 & 10 30 & 60 50 & 100 2 & 4 70 & 140 20 & 20 10 & 40 30 & 20 10 & 60 50 & 20 10 & 100 70 & 20 10 & 140
LCM Calculator
Enter two numbers separate by comma. To find least common multiple (LCM) of more than two numbers, click here.