What is the Greatest Common Factor of 351 and 357?

Greatest common factor (GCF) of 351 and 357 is 3.

GCF(351,357) = 3

We will now calculate the prime factors of 351 and 357, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 351 and 357.

How to find the GCF of 351 and 357?

We will first find the prime factorization of 351 and 357. After we will calculate the factors of 351 and 357 and find the biggest common factor number .

Step-1: Prime Factorization of 351

Prime factors of 351 are 3, 13. Prime factorization of 351 in exponential form is:

351 = 3³ × 13¹

Step-2: Prime Factorization of 357

Prime factors of 357 are 3, 7, 17. Prime factorization of 357 in exponential form is:

357 = 3¹ × 7¹ × 17¹

Step-3: Factors of 351

List of positive integer factors of 351 that divides 351 without a remainder.

1, 3, 9, 13, 27, 39, 117

Step-4: Factors of 357

List of positive integer factors of 357 that divides 351 without a remainder.

1, 3, 7, 17, 21, 51, 119

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 351 and 357. The biggest common factor number is the GCF number.
So the greatest common factor 351 and 357 is 3.

Also check out the Least Common Multiple of 351 and 357