What is the Greatest Common Factor of 19975 and 19985?

Greatest common factor (GCF) of 19975 and 19985 is 5.

GCF(19975,19985) = 5

We will now calculate the prime factors of 19975 and 19985, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19975 and 19985.

How to find the GCF of 19975 and 19985?

We will first find the prime factorization of 19975 and 19985. After we will calculate the factors of 19975 and 19985 and find the biggest common factor number .

Step-1: Prime Factorization of 19975

Prime factors of 19975 are 5, 17, 47. Prime factorization of 19975 in exponential form is:

19975 = 5² × 17¹ × 47¹

Step-2: Prime Factorization of 19985

Prime factors of 19985 are 5, 7, 571. Prime factorization of 19985 in exponential form is:

19985 = 5¹ × 7¹ × 571¹

Step-3: Factors of 19975

List of positive integer factors of 19975 that divides 19975 without a remainder.

1, 5, 17, 25, 47, 85, 235, 425, 799, 1175, 3995

Step-4: Factors of 19985

List of positive integer factors of 19985 that divides 19975 without a remainder.

1, 5, 7, 35, 571, 2855, 3997

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19975 and 19985. The biggest common factor number is the GCF number.
So the greatest common factor 19975 and 19985 is 5.

Also check out the Least Common Multiple of 19975 and 19985