What is the Greatest Common Factor of 31720 and 31740?

Greatest common factor (GCF) of 31720 and 31740 is 20.

GCF(31720,31740) = 20

We will now calculate the prime factors of 31720 and 31740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31720 and 31740.

How to find the GCF of 31720 and 31740?

We will first find the prime factorization of 31720 and 31740. After we will calculate the factors of 31720 and 31740 and find the biggest common factor number .

Step-1: Prime Factorization of 31720

Prime factors of 31720 are 2, 5, 13, 61. Prime factorization of 31720 in exponential form is:

31720 = 2³ × 5¹ × 13¹ × 61¹

Step-2: Prime Factorization of 31740

Prime factors of 31740 are 2, 3, 5, 23. Prime factorization of 31740 in exponential form is:

31740 = 2² × 3¹ × 5¹ × 23²

Step-3: Factors of 31720

List of positive integer factors of 31720 that divides 31720 without a remainder.

1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 793, 1220, 1586, 2440, 3172, 3965, 6344, 7930, 15860

Step-4: Factors of 31740

List of positive integer factors of 31740 that divides 31720 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 529, 690, 1058, 1380, 1587, 2116, 2645, 3174, 5290, 6348, 7935, 10580, 15870

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31720 and 31740. The biggest common factor number is the GCF number.
So the greatest common factor 31720 and 31740 is 20.

Also check out the Least Common Multiple of 31720 and 31740