What is the Greatest Common Factor of 67720 and 67740?

Greatest common factor (GCF) of 67720 and 67740 is 20.

GCF(67720,67740) = 20

We will now calculate the prime factors of 67720 and 67740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 67720 and 67740.

How to find the GCF of 67720 and 67740?

We will first find the prime factorization of 67720 and 67740. After we will calculate the factors of 67720 and 67740 and find the biggest common factor number .

Step-1: Prime Factorization of 67720

Prime factors of 67720 are 2, 5, 1693. Prime factorization of 67720 in exponential form is:

67720 = 2³ × 5¹ × 1693¹

Step-2: Prime Factorization of 67740

Prime factors of 67740 are 2, 3, 5, 1129. Prime factorization of 67740 in exponential form is:

67740 = 2² × 3¹ × 5¹ × 1129¹

Step-3: Factors of 67720

List of positive integer factors of 67720 that divides 67720 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 1693, 3386, 6772, 8465, 13544, 16930, 33860

Step-4: Factors of 67740

List of positive integer factors of 67740 that divides 67720 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 1129, 2258, 3387, 4516, 5645, 6774, 11290, 13548, 16935, 22580, 33870

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 67720 and 67740. The biggest common factor number is the GCF number.
So the greatest common factor 67720 and 67740 is 20.

Also check out the Least Common Multiple of 67720 and 67740