What is the Greatest Common Factor of 6428 and 6440?

Greatest common factor (GCF) of 6428 and 6440 is 4.

GCF(6428,6440) = 4

We will now calculate the prime factors of 6428 and 6440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 6428 and 6440.

How to find the GCF of 6428 and 6440?

We will first find the prime factorization of 6428 and 6440. After we will calculate the factors of 6428 and 6440 and find the biggest common factor number .

Step-1: Prime Factorization of 6428

Prime factors of 6428 are 2, 1607. Prime factorization of 6428 in exponential form is:

6428 = 2² × 1607¹

Step-2: Prime Factorization of 6440

Prime factors of 6440 are 2, 5, 7, 23. Prime factorization of 6440 in exponential form is:

6440 = 2³ × 5¹ × 7¹ × 23¹

Step-3: Factors of 6428

List of positive integer factors of 6428 that divides 6428 without a remainder.

1, 2, 4, 1607, 3214

Step-4: Factors of 6440

List of positive integer factors of 6440 that divides 6428 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 6428 and 6440. The biggest common factor number is the GCF number.
So the greatest common factor 6428 and 6440 is 4.

Also check out the Least Common Multiple of 6428 and 6440