What is the Greatest Common Factor of 19671 and 19680?

Greatest common factor (GCF) of 19671 and 19680 is 3.

GCF(19671,19680) = 3

We will now calculate the prime factors of 19671 and 19680, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19671 and 19680.

How to find the GCF of 19671 and 19680?

We will first find the prime factorization of 19671 and 19680. After we will calculate the factors of 19671 and 19680 and find the biggest common factor number .

Step-1: Prime Factorization of 19671

Prime factors of 19671 are 3, 79, 83. Prime factorization of 19671 in exponential form is:

19671 = 3¹ × 79¹ × 83¹

Step-2: Prime Factorization of 19680

Prime factors of 19680 are 2, 3, 5, 41. Prime factorization of 19680 in exponential form is:

19680 = 2⁵ × 3¹ × 5¹ × 41¹

Step-3: Factors of 19671

List of positive integer factors of 19671 that divides 19671 without a remainder.

1, 3, 79, 83, 237, 249, 6557

Step-4: Factors of 19680

List of positive integer factors of 19680 that divides 19671 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 41, 48, 60, 80, 82, 96, 120, 123, 160, 164, 205, 240, 246, 328, 410, 480, 492, 615, 656, 820, 984, 1230, 1312, 1640, 1968, 2460, 3280, 3936, 4920, 6560, 9840

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19671 and 19680. The biggest common factor number is the GCF number.
So the greatest common factor 19671 and 19680 is 3.

Also check out the Least Common Multiple of 19671 and 19680