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# What is the greatest commonΒ  factor of 18 and 63?

Updated: 8/21/2019

Wiki User

β 9y ago

The GCF of 18 and 63 is 9.

The factors of 63 are: 1, 3, 7, 9, 21, & 63

The factors of 18 are: 1, 2, 3, 6, 9, & 18

The GCF (AKA Greatest Common Factor) is 9.

Using prime factorization for 18 you get 2, and two 3's as your primes. For 63 you get 7, and two 3's as your primes. As the two 3's are in common you between both of the numbers, you do 3 multiplied by 3 which is 9. Therefore the gcf for 18, and 63 is 9.
The GCF is 9.

Wiki User

β 7y ago

Wiki User

β 11y ago

The greatest common factor of 63 and 18 is 9

Wiki User

β 7y ago

.The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.

Wiki User

β 9y ago

HCF(18, 63) = 9.

Wiki User

β 9y ago

It is: 9

Wiki User

β 14y ago

9.

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