What is the LCM of 40 and 168?
The LCM of 40 and 168 is 840.
Steps to find LCM
- Find the prime factorization of 40
40 = 2 × 2 × 2 × 5 - Find the prime factorization of 168
168 = 2 × 2 × 2 × 3 × 7 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 2 × 2 × 2 × 3 × 5 × 7 - LCM = 840
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: 80 & 336 20 & 84 120 & 504 200 & 840 280 & 1176 80 & 168 40 & 336 120 & 168 40 & 504 200 & 168 40 & 840 280 & 168 40 & 1176
LCM Calculator
Enter two numbers separate by comma. To find least common multiple (LCM) of more than two numbers, click here.