What is the Greatest Common Factor of 19540 and 19558?

Greatest common factor (GCF) of 19540 and 19558 is 2.

GCF(19540,19558) = 2

We will now calculate the prime factors of 19540 and 19558, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19540 and 19558.

How to find the GCF of 19540 and 19558?

We will first find the prime factorization of 19540 and 19558. After we will calculate the factors of 19540 and 19558 and find the biggest common factor number .

Step-1: Prime Factorization of 19540

Prime factors of 19540 are 2, 5, 977. Prime factorization of 19540 in exponential form is:

19540 = 2² × 5¹ × 977¹

Step-2: Prime Factorization of 19558

Prime factors of 19558 are 2, 7, 11, 127. Prime factorization of 19558 in exponential form is:

19558 = 2¹ × 7¹ × 11¹ × 127¹

Step-3: Factors of 19540

List of positive integer factors of 19540 that divides 19540 without a remainder.

1, 2, 4, 5, 10, 20, 977, 1954, 3908, 4885, 9770

Step-4: Factors of 19558

List of positive integer factors of 19558 that divides 19540 without a remainder.

1, 2, 7, 11, 14, 22, 77, 127, 154, 254, 889, 1397, 1778, 2794, 9779

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19540 and 19558. The biggest common factor number is the GCF number.
So the greatest common factor 19540 and 19558 is 2.

Also check out the Least Common Multiple of 19540 and 19558