What is the Greatest Common Factor of 15523 and 15540?

Greatest common factor (GCF) of 15523 and 15540 is 1.

GCF(15523,15540) = 1

We will now calculate the prime factors of 15523 and 15540, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15523 and 15540.

How to find the GCF of 15523 and 15540?

We will first find the prime factorization of 15523 and 15540. After we will calculate the factors of 15523 and 15540 and find the biggest common factor number .

Step-1: Prime Factorization of 15523

Prime factors of 15523 are 19, 43. Prime factorization of 15523 in exponential form is:

15523 = 19² × 43¹

Step-2: Prime Factorization of 15540

Prime factors of 15540 are 2, 3, 5, 7, 37. Prime factorization of 15540 in exponential form is:

15540 = 2² × 3¹ × 5¹ × 7¹ × 37¹

Step-3: Factors of 15523

List of positive integer factors of 15523 that divides 15523 without a remainder.

1, 19, 43, 361, 817

Step-4: Factors of 15540

List of positive integer factors of 15540 that divides 15523 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 37, 42, 60, 70, 74, 84, 105, 111, 140, 148, 185, 210, 222, 259, 370, 420, 444, 518, 555, 740, 777, 1036, 1110, 1295, 1554, 2220, 2590, 3108, 3885, 5180, 7770

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15523 and 15540. The biggest common factor number is the GCF number.
So the greatest common factor 15523 and 15540 is 1.

Also check out the Least Common Multiple of 15523 and 15540