What is the Greatest Common Factor of 19920 and 19939?

Greatest common factor (GCF) of 19920 and 19939 is 1.

GCF(19920,19939) = 1

We will now calculate the prime factors of 19920 and 19939, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19920 and 19939.

How to find the GCF of 19920 and 19939?

We will first find the prime factorization of 19920 and 19939. After we will calculate the factors of 19920 and 19939 and find the biggest common factor number .

Step-1: Prime Factorization of 19920

Prime factors of 19920 are 2, 3, 5, 83. Prime factorization of 19920 in exponential form is:

19920 = 2⁴ × 3¹ × 5¹ × 83¹

Step-2: Prime Factorization of 19939

Prime factors of 19939 are 127, 157. Prime factorization of 19939 in exponential form is:

19939 = 127¹ × 157¹

Step-3: Factors of 19920

List of positive integer factors of 19920 that divides 19920 without a remainder.

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

Step-4: Factors of 19939

List of positive integer factors of 19939 that divides 19920 without a remainder.

1, 127, 157

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19920 and 19939. The biggest common factor number is the GCF number.
So the greatest common factor 19920 and 19939 is 1.

Also check out the Least Common Multiple of 19920 and 19939