What is the Greatest Common Factor of 77561 and 77570?

Greatest common factor (GCF) of 77561 and 77570 is 1.

GCF(77561,77570) = 1

We will now calculate the prime factors of 77561 and 77570, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 77561 and 77570.

How to find the GCF of 77561 and 77570?

We will first find the prime factorization of 77561 and 77570. After we will calculate the factors of 77561 and 77570 and find the biggest common factor number .

Step-1: Prime Factorization of 77561

Prime factors of 77561 are 11, 641. Prime factorization of 77561 in exponential form is:

77561 = 11² × 641¹

Step-2: Prime Factorization of 77570

Prime factors of 77570 are 2, 5, 7757. Prime factorization of 77570 in exponential form is:

77570 = 2¹ × 5¹ × 7757¹

Step-3: Factors of 77561

List of positive integer factors of 77561 that divides 77561 without a remainder.

1, 11, 121, 641, 7051

Step-4: Factors of 77570

List of positive integer factors of 77570 that divides 77561 without a remainder.

1, 2, 5, 10, 7757, 15514, 38785

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 77561 and 77570. The biggest common factor number is the GCF number.
So the greatest common factor 77561 and 77570 is 1.

Also check out the Least Common Multiple of 77561 and 77570