What is the Greatest Common Factor of 455 and 470?

Greatest common factor (GCF) of 455 and 470 is 5.

GCF(455,470) = 5

We will now calculate the prime factors of 455 and 470, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 455 and 470.

How to find the GCF of 455 and 470?

We will first find the prime factorization of 455 and 470. After we will calculate the factors of 455 and 470 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 470

Prime factors of 470 are 2, 5, 47. Prime factorization of 470 in exponential form is:

470 = 2¹ × 5¹ × 47¹

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 470

List of positive integer factors of 470 that divides 455 without a remainder.

1, 2, 5, 10, 47, 94, 235

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 455 and 470. The biggest common factor number is the GCF number.
So the greatest common factor 455 and 470 is 5.

Also check out the Least Common Multiple of 455 and 470