What is the Greatest Common Factor of 9771 and 9780?

Greatest common factor (GCF) of 9771 and 9780 is 3.

GCF(9771,9780) = 3

We will now calculate the prime factors of 9771 and 9780, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9771 and 9780.

How to find the GCF of 9771 and 9780?

We will first find the prime factorization of 9771 and 9780. After we will calculate the factors of 9771 and 9780 and find the biggest common factor number .

Step-1: Prime Factorization of 9771

Prime factors of 9771 are 3, 3257. Prime factorization of 9771 in exponential form is:

9771 = 3¹ × 3257¹

Step-2: Prime Factorization of 9780

Prime factors of 9780 are 2, 3, 5, 163. Prime factorization of 9780 in exponential form is:

9780 = 2² × 3¹ × 5¹ × 163¹

Step-3: Factors of 9771

List of positive integer factors of 9771 that divides 9771 without a remainder.

1, 3, 3257

Step-4: Factors of 9780

List of positive integer factors of 9780 that divides 9771 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 163, 326, 489, 652, 815, 978, 1630, 1956, 2445, 3260, 4890

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9771 and 9780. The biggest common factor number is the GCF number.
So the greatest common factor 9771 and 9780 is 3.

Also check out the Least Common Multiple of 9771 and 9780