What is the Greatest Common Factor of 9861 and 9880?

Greatest common factor (GCF) of 9861 and 9880 is 19.

GCF(9861,9880) = 19

We will now calculate the prime factors of 9861 and 9880, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9861 and 9880.

How to find the GCF of 9861 and 9880?

We will first find the prime factorization of 9861 and 9880. After we will calculate the factors of 9861 and 9880 and find the biggest common factor number .

Step-1: Prime Factorization of 9861

Prime factors of 9861 are 3, 19, 173. Prime factorization of 9861 in exponential form is:

9861 = 3¹ × 19¹ × 173¹

Step-2: Prime Factorization of 9880

Prime factors of 9880 are 2, 5, 13, 19. Prime factorization of 9880 in exponential form is:

9880 = 2³ × 5¹ × 13¹ × 19¹

Step-3: Factors of 9861

List of positive integer factors of 9861 that divides 9861 without a remainder.

1, 3, 19, 57, 173, 519, 3287

Step-4: Factors of 9880

List of positive integer factors of 9880 that divides 9861 without a remainder.

1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2470, 4940

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9861 and 9880. The biggest common factor number is the GCF number.
So the greatest common factor 9861 and 9880 is 19.

Also check out the Least Common Multiple of 9861 and 9880