What is the Greatest Common Factor of 39940 and 39960?

Greatest common factor (GCF) of 39940 and 39960 is 20.

GCF(39940,39960) = 20

We will now calculate the prime factors of 39940 and 39960, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39940 and 39960.

How to find the GCF of 39940 and 39960?

We will first find the prime factorization of 39940 and 39960. After we will calculate the factors of 39940 and 39960 and find the biggest common factor number .

Step-1: Prime Factorization of 39940

Prime factors of 39940 are 2, 5, 1997. Prime factorization of 39940 in exponential form is:

39940 = 2² × 5¹ × 1997¹

Step-2: Prime Factorization of 39960

Prime factors of 39960 are 2, 3, 5, 37. Prime factorization of 39960 in exponential form is:

39960 = 2³ × 3³ × 5¹ × 37¹

Step-3: Factors of 39940

List of positive integer factors of 39940 that divides 39940 without a remainder.

1, 2, 4, 5, 10, 20, 1997, 3994, 7988, 9985, 19970

Step-4: Factors of 39960

List of positive integer factors of 39960 that divides 39940 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 37, 40, 45, 54, 60, 72, 74, 90, 108, 111, 120, 135, 148, 180, 185, 216, 222, 270, 296, 333, 360, 370, 444, 540, 555, 666, 740, 888, 999, 1080, 1110, 1332, 1480, 1665, 1998, 2220, 2664, 3330, 3996, 4440, 4995, 6660, 7992, 9990, 13320, 19980

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39940 and 39960. The biggest common factor number is the GCF number.
So the greatest common factor 39940 and 39960 is 20.

Also check out the Least Common Multiple of 39940 and 39960