What is the Greatest Common Factor of 455 and 475?

Greatest common factor (GCF) of 455 and 475 is 5.

GCF(455,475) = 5

We will now calculate the prime factors of 455 and 475, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 455 and 475.

How to find the GCF of 455 and 475?

We will first find the prime factorization of 455 and 475. After we will calculate the factors of 455 and 475 and find the biggest common factor number .

Step-1: Prime Factorization of 455

Prime factors of 455 are 5, 7, 13. Prime factorization of 455 in exponential form is:

455 = 5¹ × 7¹ × 13¹

Step-2: Prime Factorization of 475

Prime factors of 475 are 5, 19. Prime factorization of 475 in exponential form is:

475 = 5² × 19¹

Step-3: Factors of 455

List of positive integer factors of 455 that divides 455 without a remainder.

1, 5, 7, 13, 35, 65, 91

Step-4: Factors of 475

List of positive integer factors of 475 that divides 455 without a remainder.

1, 5, 19, 25, 95

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 455 and 475. The biggest common factor number is the GCF number.
So the greatest common factor 455 and 475 is 5.

Also check out the Least Common Multiple of 455 and 475