What is the Greatest Common Factor of 61855 and 61860?

Greatest common factor (GCF) of 61855 and 61860 is 5.

GCF(61855,61860) = 5

We will now calculate the prime factors of 61855 and 61860, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 61855 and 61860.

How to find the GCF of 61855 and 61860?

We will first find the prime factorization of 61855 and 61860. After we will calculate the factors of 61855 and 61860 and find the biggest common factor number .

Step-1: Prime Factorization of 61855

Prime factors of 61855 are 5, 89, 139. Prime factorization of 61855 in exponential form is:

61855 = 5¹ × 89¹ × 139¹

Step-2: Prime Factorization of 61860

Prime factors of 61860 are 2, 3, 5, 1031. Prime factorization of 61860 in exponential form is:

61860 = 2² × 3¹ × 5¹ × 1031¹

Step-3: Factors of 61855

List of positive integer factors of 61855 that divides 61855 without a remainder.

1, 5, 89, 139, 445, 695, 12371

Step-4: Factors of 61860

List of positive integer factors of 61860 that divides 61855 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 1031, 2062, 3093, 4124, 5155, 6186, 10310, 12372, 15465, 20620, 30930

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 61855 and 61860. The biggest common factor number is the GCF number.
So the greatest common factor 61855 and 61860 is 5.

Also check out the Least Common Multiple of 61855 and 61860