What is the Greatest Common Factor of 78870 and 78880?

Greatest common factor (GCF) of 78870 and 78880 is 10.

GCF(78870,78880) = 10

We will now calculate the prime factors of 78870 and 78880, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78870 and 78880.

How to find the GCF of 78870 and 78880?

We will first find the prime factorization of 78870 and 78880. After we will calculate the factors of 78870 and 78880 and find the biggest common factor number .

Step-1: Prime Factorization of 78870

Prime factors of 78870 are 2, 3, 5, 11, 239. Prime factorization of 78870 in exponential form is:

78870 = 2¹ × 3¹ × 5¹ × 11¹ × 239¹

Step-2: Prime Factorization of 78880

Prime factors of 78880 are 2, 5, 17, 29. Prime factorization of 78880 in exponential form is:

78880 = 2⁵ × 5¹ × 17¹ × 29¹

Step-3: Factors of 78870

List of positive integer factors of 78870 that divides 78870 without a remainder.

1, 2, 3, 5, 6, 10, 11, 15, 22, 30, 33, 55, 66, 110, 165, 239, 330, 478, 717, 1195, 1434, 2390, 2629, 3585, 5258, 7170, 7887, 13145, 15774, 26290, 39435

Step-4: Factors of 78880

List of positive integer factors of 78880 that divides 78870 without a remainder.

1, 2, 4, 5, 8, 10, 16, 17, 20, 29, 32, 34, 40, 58, 68, 80, 85, 116, 136, 145, 160, 170, 232, 272, 290, 340, 464, 493, 544, 580, 680, 928, 986, 1160, 1360, 1972, 2320, 2465, 2720, 3944, 4640, 4930, 7888, 9860, 15776, 19720, 39440

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78870 and 78880. The biggest common factor number is the GCF number.
So the greatest common factor 78870 and 78880 is 10.

Also check out the Least Common Multiple of 78870 and 78880