What is the Greatest Common Factor of 9855 and 9865?

Greatest common factor (GCF) of 9855 and 9865 is 5.

GCF(9855,9865) = 5

We will now calculate the prime factors of 9855 and 9865, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9855 and 9865.

How to find the GCF of 9855 and 9865?

We will first find the prime factorization of 9855 and 9865. After we will calculate the factors of 9855 and 9865 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 9865

Prime factors of 9865 are 5, 1973. Prime factorization of 9865 in exponential form is:

9865 = 5¹ × 1973¹

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 9865

List of positive integer factors of 9865 that divides 9855 without a remainder.

1, 5, 1973

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9855 and 9865. The biggest common factor number is the GCF number.
So the greatest common factor 9855 and 9865 is 5.

Also check out the Least Common Multiple of 9855 and 9865