What is the Greatest Common Factor of 42740 and 42758?

Greatest common factor (GCF) of 42740 and 42758 is 2.

GCF(42740,42758) = 2

We will now calculate the prime factors of 42740 and 42758, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42740 and 42758.

How to find the GCF of 42740 and 42758?

We will first find the prime factorization of 42740 and 42758. After we will calculate the factors of 42740 and 42758 and find the biggest common factor number .

Step-1: Prime Factorization of 42740

Prime factors of 42740 are 2, 5, 2137. Prime factorization of 42740 in exponential form is:

42740 = 2² × 5¹ × 2137¹

Step-2: Prime Factorization of 42758

Prime factors of 42758 are 2, 21379. Prime factorization of 42758 in exponential form is:

42758 = 2¹ × 21379¹

Step-3: Factors of 42740

List of positive integer factors of 42740 that divides 42740 without a remainder.

1, 2, 4, 5, 10, 20, 2137, 4274, 8548, 10685, 21370

Step-4: Factors of 42758

List of positive integer factors of 42758 that divides 42740 without a remainder.

1, 2, 21379

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42740 and 42758. The biggest common factor number is the GCF number.
So the greatest common factor 42740 and 42758 is 2.

Also check out the Least Common Multiple of 42740 and 42758