What is the Greatest Common Factor of 9855 and 9860?

Greatest common factor (GCF) of 9855 and 9860 is 5.

GCF(9855,9860) = 5

We will now calculate the prime factors of 9855 and 9860, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9855 and 9860.

How to find the GCF of 9855 and 9860?

We will first find the prime factorization of 9855 and 9860. After we will calculate the factors of 9855 and 9860 and find the biggest common factor number .

Step-1: Prime Factorization of 9855

Prime factors of 9855 are 3, 5, 73. Prime factorization of 9855 in exponential form is:

9855 = 3³ × 5¹ × 73¹

Step-2: Prime Factorization of 9860

Prime factors of 9860 are 2, 5, 17, 29. Prime factorization of 9860 in exponential form is:

9860 = 2² × 5¹ × 17¹ × 29¹

Step-3: Factors of 9855

List of positive integer factors of 9855 that divides 9855 without a remainder.

1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 3285

Step-4: Factors of 9860

List of positive integer factors of 9860 that divides 9855 without a remainder.

1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2465, 4930

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9855 and 9860. The biggest common factor number is the GCF number.
So the greatest common factor 9855 and 9860 is 5.

Also check out the Least Common Multiple of 9855 and 9860