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

Updated: 8/21/2019 Wiki User

8y 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

6y ago   Wiki User

11y ago

The greatest common factor of 63 and 18 is 9   Wiki User

6y 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

9y ago

HCF(18, 63) = 9.   Wiki User

8y ago

It is: 9   Wiki User

14y ago

9.   Earn +20 pts
Q: What is the greatest common  factor of 18 and 63?
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The GCF is 9.

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