What is the Greatest Common Factor of 9720 and 9740?

Greatest common factor (GCF) of 9720 and 9740 is 20.

GCF(9720,9740) = 20

We will now calculate the prime factors of 9720 and 9740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9720 and 9740.

How to find the GCF of 9720 and 9740?

We will first find the prime factorization of 9720 and 9740. After we will calculate the factors of 9720 and 9740 and find the biggest common factor number .

Step-1: Prime Factorization of 9720

Prime factors of 9720 are 2, 3, 5. Prime factorization of 9720 in exponential form is:

9720 = 2³ × 3⁵ × 5¹

Step-2: Prime Factorization of 9740

Prime factors of 9740 are 2, 5, 487. Prime factorization of 9740 in exponential form is:

9740 = 2² × 5¹ × 487¹

Step-3: Factors of 9720

List of positive integer factors of 9720 that divides 9720 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 243, 270, 324, 360, 405, 486, 540, 648, 810, 972, 1080, 1215, 1620, 1944, 2430, 3240, 4860

Step-4: Factors of 9740

List of positive integer factors of 9740 that divides 9720 without a remainder.

1, 2, 4, 5, 10, 20, 487, 974, 1948, 2435, 4870

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9720 and 9740. The biggest common factor number is the GCF number.
So the greatest common factor 9720 and 9740 is 20.

Also check out the Least Common Multiple of 9720 and 9740