What is the Greatest Common Factor of 81558 and 81572?

Greatest common factor (GCF) of 81558 and 81572 is 2.

GCF(81558,81572) = 2

We will now calculate the prime factors of 81558 and 81572, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81558 and 81572.

How to find the GCF of 81558 and 81572?

We will first find the prime factorization of 81558 and 81572. After we will calculate the factors of 81558 and 81572 and find the biggest common factor number .

Step-1: Prime Factorization of 81558

Prime factors of 81558 are 2, 3, 23, 197. Prime factorization of 81558 in exponential form is:

81558 = 2¹ × 3² × 23¹ × 197¹

Step-2: Prime Factorization of 81572

Prime factors of 81572 are 2, 20393. Prime factorization of 81572 in exponential form is:

81572 = 2² × 20393¹

Step-3: Factors of 81558

List of positive integer factors of 81558 that divides 81558 without a remainder.

1, 2, 3, 6, 9, 18, 23, 46, 69, 138, 197, 207, 394, 414, 591, 1182, 1773, 3546, 4531, 9062, 13593, 27186, 40779

Step-4: Factors of 81572

List of positive integer factors of 81572 that divides 81558 without a remainder.

1, 2, 4, 20393, 40786

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81558 and 81572. The biggest common factor number is the GCF number.
So the greatest common factor 81558 and 81572 is 2.

Also check out the Least Common Multiple of 81558 and 81572