What is the Greatest Common Factor of 9780 and 9789?

Greatest common factor (GCF) of 9780 and 9789 is 3.

GCF(9780,9789) = 3

We will now calculate the prime factors of 9780 and 9789, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9780 and 9789.

How to find the GCF of 9780 and 9789?

We will first find the prime factorization of 9780 and 9789. After we will calculate the factors of 9780 and 9789 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 9789

Prime factors of 9789 are 3, 13, 251. Prime factorization of 9789 in exponential form is:

9789 = 3¹ × 13¹ × 251¹

Step-3: Factors of 9780

List of positive integer factors of 9780 that divides 9780 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

Step-4: Factors of 9789

List of positive integer factors of 9789 that divides 9780 without a remainder.

1, 3, 13, 39, 251, 753, 3263

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9780 and 9789. The biggest common factor number is the GCF number.
So the greatest common factor 9780 and 9789 is 3.

Also check out the Least Common Multiple of 9780 and 9789