What is the Greatest Common Factor of 15420 and 15429?

Greatest common factor (GCF) of 15420 and 15429 is 3.

GCF(15420,15429) = 3

We will now calculate the prime factors of 15420 and 15429, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15420 and 15429.

How to find the GCF of 15420 and 15429?

We will first find the prime factorization of 15420 and 15429. After we will calculate the factors of 15420 and 15429 and find the biggest common factor number .

Step-1: Prime Factorization of 15420

Prime factors of 15420 are 2, 3, 5, 257. Prime factorization of 15420 in exponential form is:

15420 = 2² × 3¹ × 5¹ × 257¹

Step-2: Prime Factorization of 15429

Prime factors of 15429 are 3, 37, 139. Prime factorization of 15429 in exponential form is:

15429 = 3¹ × 37¹ × 139¹

Step-3: Factors of 15420

List of positive integer factors of 15420 that divides 15420 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 257, 514, 771, 1028, 1285, 1542, 2570, 3084, 3855, 5140, 7710

Step-4: Factors of 15429

List of positive integer factors of 15429 that divides 15420 without a remainder.

1, 3, 37, 111, 139, 417, 5143

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15420 and 15429. The biggest common factor number is the GCF number.
So the greatest common factor 15420 and 15429 is 3.

Also check out the Least Common Multiple of 15420 and 15429