Factor them.
3 x 7 = 21
3 x 11 = 33
3 x 19 = 57
Multiply the highest amount of each factor.
3 x 7 x 11 x 19 = 4389
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The Least Common Multiple (LCM) for 49 63 21 is 441.
The least common multiple of the numbers 21, 48 and 49 is 2,352.
The Least Common Multiple (LCM) of (3,7) is 21.
You need at least two numbers to find an LCM. If that's 21 and 24, the LCM is 168.
The least common multiple of 21 and 56 is 168.The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.