What is the Greatest Common Factor of 39840 and 39860?

Greatest common factor (GCF) of 39840 and 39860 is 20.

GCF(39840,39860) = 20

We will now calculate the prime factors of 39840 and 39860, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39840 and 39860.

How to find the GCF of 39840 and 39860?

We will first find the prime factorization of 39840 and 39860. After we will calculate the factors of 39840 and 39860 and find the biggest common factor number .

Step-1: Prime Factorization of 39840

Prime factors of 39840 are 2, 3, 5, 83. Prime factorization of 39840 in exponential form is:

39840 = 2⁵ × 3¹ × 5¹ × 83¹

Step-2: Prime Factorization of 39860

Prime factors of 39860 are 2, 5, 1993. Prime factorization of 39860 in exponential form is:

39860 = 2² × 5¹ × 1993¹

Step-3: Factors of 39840

List of positive integer factors of 39840 that divides 39840 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 83, 96, 120, 160, 166, 240, 249, 332, 415, 480, 498, 664, 830, 996, 1245, 1328, 1660, 1992, 2490, 2656, 3320, 3984, 4980, 6640, 7968, 9960, 13280, 19920

Step-4: Factors of 39860

List of positive integer factors of 39860 that divides 39840 without a remainder.

1, 2, 4, 5, 10, 20, 1993, 3986, 7972, 9965, 19930

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39840 and 39860. The biggest common factor number is the GCF number.
So the greatest common factor 39840 and 39860 is 20.

Also check out the Least Common Multiple of 39840 and 39860