What is the Greatest Common Factor of 19940 and 19947?

Greatest common factor (GCF) of 19940 and 19947 is 1.

GCF(19940,19947) = 1

We will now calculate the prime factors of 19940 and 19947, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19940 and 19947.

How to find the GCF of 19940 and 19947?

We will first find the prime factorization of 19940 and 19947. After we will calculate the factors of 19940 and 19947 and find the biggest common factor number .

Step-1: Prime Factorization of 19940

Prime factors of 19940 are 2, 5, 997. Prime factorization of 19940 in exponential form is:

19940 = 2² × 5¹ × 997¹

Step-2: Prime Factorization of 19947

Prime factors of 19947 are 3, 61, 109. Prime factorization of 19947 in exponential form is:

19947 = 3¹ × 61¹ × 109¹

Step-3: Factors of 19940

List of positive integer factors of 19940 that divides 19940 without a remainder.

1, 2, 4, 5, 10, 20, 997, 1994, 3988, 4985, 9970

Step-4: Factors of 19947

List of positive integer factors of 19947 that divides 19940 without a remainder.

1, 3, 61, 109, 183, 327, 6649

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19940 and 19947. The biggest common factor number is the GCF number.
So the greatest common factor 19940 and 19947 is 1.

Also check out the Least Common Multiple of 19940 and 19947