What is the Greatest Common Factor of 945 and 955?

Greatest common factor (GCF) of 945 and 955 is 5.

GCF(945,955) = 5

We will now calculate the prime factors of 945 and 955, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 945 and 955.

How to find the GCF of 945 and 955?

We will first find the prime factorization of 945 and 955. After we will calculate the factors of 945 and 955 and find the biggest common factor number .

Step-1: Prime Factorization of 945

Prime factors of 945 are 3, 5, 7. Prime factorization of 945 in exponential form is:

945 = 3³ × 5¹ × 7¹

Step-2: Prime Factorization of 955

Prime factors of 955 are 5, 191. Prime factorization of 955 in exponential form is:

955 = 5¹ × 191¹

Step-3: Factors of 945

List of positive integer factors of 945 that divides 945 without a remainder.

1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315

Step-4: Factors of 955

List of positive integer factors of 955 that divides 945 without a remainder.

1, 5, 191

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 945 and 955. The biggest common factor number is the GCF number.
So the greatest common factor 945 and 955 is 5.

Also check out the Least Common Multiple of 945 and 955