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

(Sixty-three)

Finding LCM for 63 and 21 using GCF of these numbers

The first method to find LCM for numbers 63 and 21 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 63 and 21 is 21, so

LCM = (63 × 21) ÷ 21

LCM = 1,323 ÷ 21

LCM = 63

Finding LCM for 63 and 21 by Listing Multiples

The second method to find LCM for numbers 63 and 21 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 63: 63, 126, 189

Multiples of 21: 21, 42, 63, 84, 105

So the LCM for 63 and 21 is 63

Finding LCM for 63 and 21 by Prime Factorization

Another method to find LCM for numbers 63 and 21 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 63: 3, 3, 7 (exponent form: 32, 71)

All Prime Factors of 21: 3, 7 (exponent form: 31, 71)

32 × 71 = 63

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About "Least Common Multiple" Calculator

This calculator will help you find the Least Common Multiple (LCM) of two numbers. For example, it can help you find out what's the Least Common Multiple (LCM) of 63 and 21? (The answer is: 63). Select the first number (e.g. '63') and the second number (e.g. '21'). After that hit the 'Calculate' button.
Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers
"Least Common Multiple" Calculator
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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.

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