What is the Greatest Common Factor of 66720 and 66738?

Greatest common factor (GCF) of 66720 and 66738 is 6.

GCF(66720,66738) = 6

We will now calculate the prime factors of 66720 and 66738, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66720 and 66738.

How to find the GCF of 66720 and 66738?

We will first find the prime factorization of 66720 and 66738. After we will calculate the factors of 66720 and 66738 and find the biggest common factor number .

Step-1: Prime Factorization of 66720

Prime factors of 66720 are 2, 3, 5, 139. Prime factorization of 66720 in exponential form is:

66720 = 2⁵ × 3¹ × 5¹ × 139¹

Step-2: Prime Factorization of 66738

Prime factors of 66738 are 2, 3, 7, 227. Prime factorization of 66738 in exponential form is:

66738 = 2¹ × 3¹ × 7² × 227¹

Step-3: Factors of 66720

List of positive integer factors of 66720 that divides 66720 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 139, 160, 240, 278, 417, 480, 556, 695, 834, 1112, 1390, 1668, 2085, 2224, 2780, 3336, 4170, 4448, 5560, 6672, 8340, 11120, 13344, 16680, 22240, 33360

Step-4: Factors of 66738

List of positive integer factors of 66738 that divides 66720 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 227, 294, 454, 681, 1362, 1589, 3178, 4767, 9534, 11123, 22246, 33369

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66720 and 66738. The biggest common factor number is the GCF number.
So the greatest common factor 66720 and 66738 is 6.

Also check out the Least Common Multiple of 66720 and 66738