What is the Greatest Common Factor of 8420 and 8428?

Greatest common factor (GCF) of 8420 and 8428 is 4.

GCF(8420,8428) = 4

We will now calculate the prime factors of 8420 and 8428, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 8420 and 8428.

How to find the GCF of 8420 and 8428?

We will first find the prime factorization of 8420 and 8428. After we will calculate the factors of 8420 and 8428 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 8428

Prime factors of 8428 are 2, 7, 43. Prime factorization of 8428 in exponential form is:

8428 = 2² × 7² × 43¹

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 8428

List of positive integer factors of 8428 that divides 8420 without a remainder.

1, 2, 4, 7, 14, 28, 43, 49, 86, 98, 172, 196, 301, 602, 1204, 2107, 4214

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 8420 and 8428. The biggest common factor number is the GCF number.
So the greatest common factor 8420 and 8428 is 4.

Also check out the Least Common Multiple of 8420 and 8428