The least common multiple of the numbers 21 and 12 is 84.
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The least common multiple of 6, 12 and 21 is 84.
The LCM is: 84
The LCM is 252.
The least common multiple of the numbers 7, 18 and 21 is 126.
For 21, 63 and 167 the LCM is: 10,521