What is the Greatest Common Factor of 31978 and 31986?

Greatest common factor (GCF) of 31978 and 31986 is 2.

GCF(31978,31986) = 2

We will now calculate the prime factors of 31978 and 31986, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31978 and 31986.

How to find the GCF of 31978 and 31986?

We will first find the prime factorization of 31978 and 31986. After we will calculate the factors of 31978 and 31986 and find the biggest common factor number .

Step-1: Prime Factorization of 31978

Prime factors of 31978 are 2, 59, 271. Prime factorization of 31978 in exponential form is:

31978 = 2¹ × 59¹ × 271¹

Step-2: Prime Factorization of 31986

Prime factors of 31986 are 2, 3, 1777. Prime factorization of 31986 in exponential form is:

31986 = 2¹ × 3² × 1777¹

Step-3: Factors of 31978

List of positive integer factors of 31978 that divides 31978 without a remainder.

1, 2, 59, 118, 271, 542, 15989

Step-4: Factors of 31986

List of positive integer factors of 31986 that divides 31978 without a remainder.

1, 2, 3, 6, 9, 18, 1777, 3554, 5331, 10662, 15993

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31978 and 31986. The biggest common factor number is the GCF number.
So the greatest common factor 31978 and 31986 is 2.

Also check out the Least Common Multiple of 31978 and 31986