What is the Greatest Common Factor of 70780 and 70785?

Greatest common factor (GCF) of 70780 and 70785 is 5.

GCF(70780,70785) = 5

We will now calculate the prime factors of 70780 and 70785, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 70780 and 70785.

How to find the GCF of 70780 and 70785?

We will first find the prime factorization of 70780 and 70785. After we will calculate the factors of 70780 and 70785 and find the biggest common factor number .

Step-1: Prime Factorization of 70780

Prime factors of 70780 are 2, 5, 3539. Prime factorization of 70780 in exponential form is:

70780 = 2² × 5¹ × 3539¹

Step-2: Prime Factorization of 70785

Prime factors of 70785 are 3, 5, 11, 13. Prime factorization of 70785 in exponential form is:

70785 = 3² × 5¹ × 11² × 13¹

Step-3: Factors of 70780

List of positive integer factors of 70780 that divides 70780 without a remainder.

1, 2, 4, 5, 10, 20, 3539, 7078, 14156, 17695, 35390

Step-4: Factors of 70785

List of positive integer factors of 70785 that divides 70780 without a remainder.

1, 3, 5, 9, 11, 13, 15, 33, 39, 45, 55, 65, 99, 117, 121, 143, 165, 195, 363, 429, 495, 585, 605, 715, 1089, 1287, 1573, 1815, 2145, 4719, 5445, 6435, 7865, 14157, 23595

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 70780 and 70785. The biggest common factor number is the GCF number.
So the greatest common factor 70780 and 70785 is 5.

Also check out the Least Common Multiple of 70780 and 70785