What is the Greatest Common Factor of 66438 and 66456?

Greatest common factor (GCF) of 66438 and 66456 is 18.

GCF(66438,66456) = 18

We will now calculate the prime factors of 66438 and 66456, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66438 and 66456.

How to find the GCF of 66438 and 66456?

We will first find the prime factorization of 66438 and 66456. After we will calculate the factors of 66438 and 66456 and find the biggest common factor number .

Step-1: Prime Factorization of 66438

Prime factors of 66438 are 2, 3, 3691. Prime factorization of 66438 in exponential form is:

66438 = 2¹ × 3² × 3691¹

Step-2: Prime Factorization of 66456

Prime factors of 66456 are 2, 3, 13, 71. Prime factorization of 66456 in exponential form is:

66456 = 2³ × 3² × 13¹ × 71¹

Step-3: Factors of 66438

List of positive integer factors of 66438 that divides 66438 without a remainder.

1, 2, 3, 6, 9, 18, 3691, 7382, 11073, 22146, 33219

Step-4: Factors of 66456

List of positive integer factors of 66456 that divides 66438 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 36, 39, 52, 71, 72, 78, 104, 117, 142, 156, 213, 234, 284, 312, 426, 468, 568, 639, 852, 923, 936, 1278, 1704, 1846, 2556, 2769, 3692, 5112, 5538, 7384, 8307, 11076, 16614, 22152, 33228

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66438 and 66456. The biggest common factor number is the GCF number.
So the greatest common factor 66438 and 66456 is 18.

Also check out the Least Common Multiple of 66438 and 66456