What is the Greatest Common Factor of 63990 and 63998?

Greatest common factor (GCF) of 63990 and 63998 is 2.

GCF(63990,63998) = 2

We will now calculate the prime factors of 63990 and 63998, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 63990 and 63998.

How to find the GCF of 63990 and 63998?

We will first find the prime factorization of 63990 and 63998. After we will calculate the factors of 63990 and 63998 and find the biggest common factor number .

Step-1: Prime Factorization of 63990

Prime factors of 63990 are 2, 3, 5, 79. Prime factorization of 63990 in exponential form is:

63990 = 2¹ × 3⁴ × 5¹ × 79¹

Step-2: Prime Factorization of 63998

Prime factors of 63998 are 2, 11, 2909. Prime factorization of 63998 in exponential form is:

63998 = 2¹ × 11¹ × 2909¹

Step-3: Factors of 63990

List of positive integer factors of 63990 that divides 63990 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 79, 81, 90, 135, 158, 162, 237, 270, 395, 405, 474, 711, 790, 810, 1185, 1422, 2133, 2370, 3555, 4266, 6399, 7110, 10665, 12798, 21330, 31995

Step-4: Factors of 63998

List of positive integer factors of 63998 that divides 63990 without a remainder.

1, 2, 11, 22, 2909, 5818, 31999

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 63990 and 63998. The biggest common factor number is the GCF number.
So the greatest common factor 63990 and 63998 is 2.

Also check out the Least Common Multiple of 63990 and 63998