What is the LCM of 21 and 63?
The LCM of 21 and 63 is 63.
Steps to find LCM
- Find the prime factorization of 21
21 = 3 × 7 - Find the prime factorization of 63
63 = 3 × 3 × 7 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:
LCM = 3 × 3 × 7 - LCM = 63
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Find least common multiple (LCM) of: 42 & 126 63 & 189 7 & 21 105 & 315 147 & 441 3 & 9 42 & 63 21 & 126 63 & 63 21 & 189 105 & 63 21 & 315 147 & 63 21 & 441
LCM Calculator
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