What is the LCM of 20 and 90?
The LCM of 20 and 90 is 180.
Steps to find LCM
- Find the prime factorization of 20
20 = 2 × 2 × 5 - Find the prime factorization of 90
90 = 2 × 3 × 3 × 5 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 2 × 2 × 3 × 3 × 5 - LCM = 180
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Find least common multiple (LCM) of: 40 & 180 10 & 45 60 & 270 100 & 450 4 & 18 140 & 630 40 & 90 20 & 180 60 & 90 20 & 270 100 & 90 20 & 450 140 & 90 20 & 630
LCM Calculator
Enter two numbers separate by comma. To find least common multiple (LCM) of more than two numbers, click here.