What is the Greatest Common Factor of 19686 and 19695?

Greatest common factor (GCF) of 19686 and 19695 is 3.

GCF(19686,19695) = 3

We will now calculate the prime factors of 19686 and 19695, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19686 and 19695.

How to find the GCF of 19686 and 19695?

We will first find the prime factorization of 19686 and 19695. After we will calculate the factors of 19686 and 19695 and find the biggest common factor number .

Step-1: Prime Factorization of 19686

Prime factors of 19686 are 2, 3, 17, 193. Prime factorization of 19686 in exponential form is:

19686 = 2¹ × 3¹ × 17¹ × 193¹

Step-2: Prime Factorization of 19695

Prime factors of 19695 are 3, 5, 13, 101. Prime factorization of 19695 in exponential form is:

19695 = 3¹ × 5¹ × 13¹ × 101¹

Step-3: Factors of 19686

List of positive integer factors of 19686 that divides 19686 without a remainder.

1, 2, 3, 6, 17, 34, 51, 102, 193, 386, 579, 1158, 3281, 6562, 9843

Step-4: Factors of 19695

List of positive integer factors of 19695 that divides 19686 without a remainder.

1, 3, 5, 13, 15, 39, 65, 101, 195, 303, 505, 1313, 1515, 3939, 6565

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19686 and 19695. The biggest common factor number is the GCF number.
So the greatest common factor 19686 and 19695 is 3.

Also check out the Least Common Multiple of 19686 and 19695