What is the Greatest Common Factor of 622 and 642?

Greatest common factor (GCF) of 622 and 642 is 2.

GCF(622,642) = 2

We will now calculate the prime factors of 622 and 642, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 622 and 642.

How to find the GCF of 622 and 642?

We will first find the prime factorization of 622 and 642. After we will calculate the factors of 622 and 642 and find the biggest common factor number .

Step-1: Prime Factorization of 622

Prime factors of 622 are 2, 311. Prime factorization of 622 in exponential form is:

622 = 2¹ × 311¹

Step-2: Prime Factorization of 642

Prime factors of 642 are 2, 3, 107. Prime factorization of 642 in exponential form is:

642 = 2¹ × 3¹ × 107¹

Step-3: Factors of 622

List of positive integer factors of 622 that divides 622 without a remainder.

1, 2, 311

Step-4: Factors of 642

List of positive integer factors of 642 that divides 622 without a remainder.

1, 2, 3, 6, 107, 214, 321

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 622 and 642. The biggest common factor number is the GCF number.
So the greatest common factor 622 and 642 is 2.

Also check out the Least Common Multiple of 622 and 642