What is the Greatest Common Factor of 9 and 3?

Greatest common factor (GCF) of 9 and 3 is 3.

GCF(9,3) = 3

We will now calculate the prime factors of 9 and 3, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9 and 3.

How to find the GCF of 9 and 3?

We will first find the prime factorization of 9 and 3. After we will calculate the factors of 9 and 3 and find the biggest common factor number .

Step-1: Prime Factorization of 9

Prime factors of 9 are 3. Prime factorization of 9 in exponential form is:

9 = 3²

Step-2: Prime Factorization of 3

Prime factors of 3 are 3. Prime factorization of 3 in exponential form is:

3 = 3¹

Step-3: Factors of 9

List of positive integer factors of 9 that divides 9 without a remainder.

1, 3

Step-4: Factors of 3

List of positive integer factors of 3 that divides 9 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9 and 3. The biggest common factor number is the GCF number.
So the greatest common factor 9 and 3 is 3.

Also check out the Least Common Multiple of 9 and 3