What is the Greatest Common Factor of 39780 and 39789?

Greatest common factor (GCF) of 39780 and 39789 is 9.

GCF(39780,39789) = 9

We will now calculate the prime factors of 39780 and 39789, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39780 and 39789.

How to find the GCF of 39780 and 39789?

We will first find the prime factorization of 39780 and 39789. After we will calculate the factors of 39780 and 39789 and find the biggest common factor number .

Step-1: Prime Factorization of 39780

Prime factors of 39780 are 2, 3, 5, 13, 17. Prime factorization of 39780 in exponential form is:

39780 = 2² × 3² × 5¹ × 13¹ × 17¹

Step-2: Prime Factorization of 39789

Prime factors of 39789 are 3, 4421. Prime factorization of 39789 in exponential form is:

39789 = 3² × 4421¹

Step-3: Factors of 39780

List of positive integer factors of 39780 that divides 39780 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 17, 18, 20, 26, 30, 34, 36, 39, 45, 51, 52, 60, 65, 68, 78, 85, 90, 102, 117, 130, 153, 156, 170, 180, 195, 204, 221, 234, 255, 260, 306, 340, 390, 442, 468, 510, 585, 612, 663, 765, 780, 884, 1020, 1105, 1170, 1326, 1530, 1989, 2210, 2340, 2652, 3060, 3315, 3978, 4420, 6630, 7956, 9945, 13260, 19890

Step-4: Factors of 39789

List of positive integer factors of 39789 that divides 39780 without a remainder.

1, 3, 9, 4421, 13263

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39780 and 39789. The biggest common factor number is the GCF number.
So the greatest common factor 39780 and 39789 is 9.

Also check out the Least Common Multiple of 39780 and 39789