What is the Greatest Common Factor of 64720 and 64740?

Greatest common factor (GCF) of 64720 and 64740 is 20.

GCF(64720,64740) = 20

We will now calculate the prime factors of 64720 and 64740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64720 and 64740.

How to find the GCF of 64720 and 64740?

We will first find the prime factorization of 64720 and 64740. After we will calculate the factors of 64720 and 64740 and find the biggest common factor number .

Step-1: Prime Factorization of 64720

Prime factors of 64720 are 2, 5, 809. Prime factorization of 64720 in exponential form is:

64720 = 2⁴ × 5¹ × 809¹

Step-2: Prime Factorization of 64740

Prime factors of 64740 are 2, 3, 5, 13, 83. Prime factorization of 64740 in exponential form is:

64740 = 2² × 3¹ × 5¹ × 13¹ × 83¹

Step-3: Factors of 64720

List of positive integer factors of 64720 that divides 64720 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809, 1618, 3236, 4045, 6472, 8090, 12944, 16180, 32360

Step-4: Factors of 64740

List of positive integer factors of 64740 that divides 64720 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 83, 130, 156, 166, 195, 249, 260, 332, 390, 415, 498, 780, 830, 996, 1079, 1245, 1660, 2158, 2490, 3237, 4316, 4980, 5395, 6474, 10790, 12948, 16185, 21580, 32370

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64720 and 64740. The biggest common factor number is the GCF number.
So the greatest common factor 64720 and 64740 is 20.

Also check out the Least Common Multiple of 64720 and 64740