What is the Greatest Common Factor of 30945 and 30957?

Greatest common factor (GCF) of 30945 and 30957 is 3.

GCF(30945,30957) = 3

We will now calculate the prime factors of 30945 and 30957, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 30945 and 30957.

How to find the GCF of 30945 and 30957?

We will first find the prime factorization of 30945 and 30957. After we will calculate the factors of 30945 and 30957 and find the biggest common factor number .

Step-1: Prime Factorization of 30945

Prime factors of 30945 are 3, 5, 2063. Prime factorization of 30945 in exponential form is:

30945 = 3¹ × 5¹ × 2063¹

Step-2: Prime Factorization of 30957

Prime factors of 30957 are 3, 17, 607. Prime factorization of 30957 in exponential form is:

30957 = 3¹ × 17¹ × 607¹

Step-3: Factors of 30945

List of positive integer factors of 30945 that divides 30945 without a remainder.

1, 3, 5, 15, 2063, 6189, 10315

Step-4: Factors of 30957

List of positive integer factors of 30957 that divides 30945 without a remainder.

1, 3, 17, 51, 607, 1821, 10319

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 30945 and 30957. The biggest common factor number is the GCF number.
So the greatest common factor 30945 and 30957 is 3.

Also check out the Least Common Multiple of 30945 and 30957