What is the Greatest Common Factor of 435 and 455?

Greatest common factor (GCF) of 435 and 455 is 5.

GCF(435,455) = 5

We will now calculate the prime factors of 435 and 455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 435 and 455.

How to find the GCF of 435 and 455?

We will first find the prime factorization of 435 and 455. After we will calculate the factors of 435 and 455 and find the biggest common factor number .

Step-1: Prime Factorization of 435

Prime factors of 435 are 3, 5, 29. Prime factorization of 435 in exponential form is:

435 = 3¹ × 5¹ × 29¹

Step-2: 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-3: Factors of 435

List of positive integer factors of 435 that divides 435 without a remainder.

1, 3, 5, 15, 29, 87, 145

Step-4: Factors of 455

List of positive integer factors of 455 that divides 435 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 435 and 455. The biggest common factor number is the GCF number.
So the greatest common factor 435 and 455 is 5.

Also check out the Least Common Multiple of 435 and 455