What is the Greatest Common Factor of 42556 and 42570?

Greatest common factor (GCF) of 42556 and 42570 is 2.

GCF(42556,42570) = 2

We will now calculate the prime factors of 42556 and 42570, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42556 and 42570.

How to find the GCF of 42556 and 42570?

We will first find the prime factorization of 42556 and 42570. After we will calculate the factors of 42556 and 42570 and find the biggest common factor number .

Step-1: Prime Factorization of 42556

Prime factors of 42556 are 2, 10639. Prime factorization of 42556 in exponential form is:

42556 = 2² × 10639¹

Step-2: Prime Factorization of 42570

Prime factors of 42570 are 2, 3, 5, 11, 43. Prime factorization of 42570 in exponential form is:

42570 = 2¹ × 3² × 5¹ × 11¹ × 43¹

Step-3: Factors of 42556

List of positive integer factors of 42556 that divides 42556 without a remainder.

1, 2, 4, 10639, 21278

Step-4: Factors of 42570

List of positive integer factors of 42570 that divides 42556 without a remainder.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 43, 45, 55, 66, 86, 90, 99, 110, 129, 165, 198, 215, 258, 330, 387, 430, 473, 495, 645, 774, 946, 990, 1290, 1419, 1935, 2365, 2838, 3870, 4257, 4730, 7095, 8514, 14190, 21285

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42556 and 42570. The biggest common factor number is the GCF number.
So the greatest common factor 42556 and 42570 is 2.

Also check out the Least Common Multiple of 42556 and 42570