What is the Greatest Common Factor of 68720 and 68740?

Greatest common factor (GCF) of 68720 and 68740 is 20.

GCF(68720,68740) = 20

We will now calculate the prime factors of 68720 and 68740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 68720 and 68740.

How to find the GCF of 68720 and 68740?

We will first find the prime factorization of 68720 and 68740. After we will calculate the factors of 68720 and 68740 and find the biggest common factor number .

Step-1: Prime Factorization of 68720

Prime factors of 68720 are 2, 5, 859. Prime factorization of 68720 in exponential form is:

68720 = 2⁴ × 5¹ × 859¹

Step-2: Prime Factorization of 68740

Prime factors of 68740 are 2, 5, 7, 491. Prime factorization of 68740 in exponential form is:

68740 = 2² × 5¹ × 7¹ × 491¹

Step-3: Factors of 68720

List of positive integer factors of 68720 that divides 68720 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 859, 1718, 3436, 4295, 6872, 8590, 13744, 17180, 34360

Step-4: Factors of 68740

List of positive integer factors of 68740 that divides 68720 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 491, 982, 1964, 2455, 3437, 4910, 6874, 9820, 13748, 17185, 34370

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 68720 and 68740. The biggest common factor number is the GCF number.
So the greatest common factor 68720 and 68740 is 20.

Also check out the Least Common Multiple of 68720 and 68740