What is the Greatest Common Factor of 15715 and 15720?

Greatest common factor (GCF) of 15715 and 15720 is 5.

GCF(15715,15720) = 5

We will now calculate the prime factors of 15715 and 15720, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15715 and 15720.

How to find the GCF of 15715 and 15720?

We will first find the prime factorization of 15715 and 15720. After we will calculate the factors of 15715 and 15720 and find the biggest common factor number .

Step-1: Prime Factorization of 15715

Prime factors of 15715 are 5, 7, 449. Prime factorization of 15715 in exponential form is:

15715 = 5¹ × 7¹ × 449¹

Step-2: Prime Factorization of 15720

Prime factors of 15720 are 2, 3, 5, 131. Prime factorization of 15720 in exponential form is:

15720 = 2³ × 3¹ × 5¹ × 131¹

Step-3: Factors of 15715

List of positive integer factors of 15715 that divides 15715 without a remainder.

1, 5, 7, 35, 449, 2245, 3143

Step-4: Factors of 15720

List of positive integer factors of 15720 that divides 15715 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 131, 262, 393, 524, 655, 786, 1048, 1310, 1572, 1965, 2620, 3144, 3930, 5240, 7860

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15715 and 15720. The biggest common factor number is the GCF number.
So the greatest common factor 15715 and 15720 is 5.

Also check out the Least Common Multiple of 15715 and 15720