LCM for 63 and 21

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What's the Least Common Multiple (LCM) of 63 and 21?

Answer

LCM of 63 and 21 is
63

First common multiples: 63, 126, 189, …

As a common denominator: multiply the top and bottom of y/21 by 3.

21 divides 63 (63 ÷ 21 = 3), so the LCM is the larger number itself.

63 = 32 × 7

21 = 3 × 7

Prime6321Highest power
332332
7777

LCM = 32 × 7 = 63

More with these numbers

See Also

LCM Table

Number 1Number 2LCM
636126
63763
638504
63963
6310630
6311693
6312252
6313819
6314126
6315315
63161,008
63171,071
6318126
63191,197
63201,260
632163
63221,386
63231,449
6324504
63251,575
63261,638
6327189
6328252
63291,827
6330630
63311,953
63322,016
6333693
63342,142
6335315

FAQ

What's the Least Common Multiple (LCM) of 63 and 21?

LCM of 63 and 21 is 63

How to find the LCM of 63 and 21 using prime factorization?

To find the LCM of 63 and 21, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 63.

What is the difference between LCM and GCF?

LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 63 and 21: LCM = 63, GCF = 21.

See Also