What is the Greatest Common Factor of 8420 and 8425?

Greatest common factor (GCF) of 8420 and 8425 is 5.

GCF(8420,8425) = 5

We will now calculate the prime factors of 8420 and 8425, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 8420 and 8425.

How to find the GCF of 8420 and 8425?

We will first find the prime factorization of 8420 and 8425. After we will calculate the factors of 8420 and 8425 and find the biggest common factor number .

Step-1: Prime Factorization of 8420

Prime factors of 8420 are 2, 5, 421. Prime factorization of 8420 in exponential form is:

8420 = 2² × 5¹ × 421¹

Step-2: Prime Factorization of 8425

Prime factors of 8425 are 5, 337. Prime factorization of 8425 in exponential form is:

8425 = 5² × 337¹

Step-3: Factors of 8420

List of positive integer factors of 8420 that divides 8420 without a remainder.

1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210

Step-4: Factors of 8425

List of positive integer factors of 8425 that divides 8420 without a remainder.

1, 5, 25, 337, 1685

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 8420 and 8425. The biggest common factor number is the GCF number.
So the greatest common factor 8420 and 8425 is 5.

Also check out the Least Common Multiple of 8420 and 8425