What is the Greatest Common Factor of 78155 and 78162?

Greatest common factor (GCF) of 78155 and 78162 is 7.

GCF(78155,78162) = 7

We will now calculate the prime factors of 78155 and 78162, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78155 and 78162.

How to find the GCF of 78155 and 78162?

We will first find the prime factorization of 78155 and 78162. After we will calculate the factors of 78155 and 78162 and find the biggest common factor number .

Step-1: Prime Factorization of 78155

Prime factors of 78155 are 5, 7, 11, 29. Prime factorization of 78155 in exponential form is:

78155 = 5¹ × 7² × 11¹ × 29¹

Step-2: Prime Factorization of 78162

Prime factors of 78162 are 2, 3, 7, 1861. Prime factorization of 78162 in exponential form is:

78162 = 2¹ × 3¹ × 7¹ × 1861¹

Step-3: Factors of 78155

List of positive integer factors of 78155 that divides 78155 without a remainder.

1, 5, 7, 11, 29, 35, 49, 55, 77, 145, 203, 245, 319, 385, 539, 1015, 1421, 1595, 2233, 2695, 7105, 11165, 15631

Step-4: Factors of 78162

List of positive integer factors of 78162 that divides 78155 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42, 1861, 3722, 5583, 11166, 13027, 26054, 39081

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78155 and 78162. The biggest common factor number is the GCF number.
So the greatest common factor 78155 and 78162 is 7.

Also check out the Least Common Multiple of 78155 and 78162