What is the Greatest Common Factor of 42781 and 42790?

Greatest common factor (GCF) of 42781 and 42790 is 1.

GCF(42781,42790) = 1

We will now calculate the prime factors of 42781 and 42790, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42781 and 42790.

How to find the GCF of 42781 and 42790?

We will first find the prime factorization of 42781 and 42790. After we will calculate the factors of 42781 and 42790 and find the biggest common factor number .

Step-1: Prime Factorization of 42781

Prime factors of 42781 are 179, 239. Prime factorization of 42781 in exponential form is:

42781 = 179¹ × 239¹

Step-2: Prime Factorization of 42790

Prime factors of 42790 are 2, 5, 11, 389. Prime factorization of 42790 in exponential form is:

42790 = 2¹ × 5¹ × 11¹ × 389¹

Step-3: Factors of 42781

List of positive integer factors of 42781 that divides 42781 without a remainder.

1, 179, 239

Step-4: Factors of 42790

List of positive integer factors of 42790 that divides 42781 without a remainder.

1, 2, 5, 10, 11, 22, 55, 110, 389, 778, 1945, 3890, 4279, 8558, 21395

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42781 and 42790. The biggest common factor number is the GCF number.
So the greatest common factor 42781 and 42790 is 1.

Also check out the Least Common Multiple of 42781 and 42790