What is the Greatest Common Factor of 19887 and 19902?

Greatest common factor (GCF) of 19887 and 19902 is 3.

GCF(19887,19902) = 3

We will now calculate the prime factors of 19887 and 19902, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19887 and 19902.

How to find the GCF of 19887 and 19902?

We will first find the prime factorization of 19887 and 19902. After we will calculate the factors of 19887 and 19902 and find the biggest common factor number .

Step-1: Prime Factorization of 19887

Prime factors of 19887 are 3, 7, 947. Prime factorization of 19887 in exponential form is:

19887 = 3¹ × 7¹ × 947¹

Step-2: Prime Factorization of 19902

Prime factors of 19902 are 2, 3, 31, 107. Prime factorization of 19902 in exponential form is:

19902 = 2¹ × 3¹ × 31¹ × 107¹

Step-3: Factors of 19887

List of positive integer factors of 19887 that divides 19887 without a remainder.

1, 3, 7, 21, 947, 2841, 6629

Step-4: Factors of 19902

List of positive integer factors of 19902 that divides 19887 without a remainder.

1, 2, 3, 6, 31, 62, 93, 107, 186, 214, 321, 642, 3317, 6634, 9951

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19887 and 19902. The biggest common factor number is the GCF number.
So the greatest common factor 19887 and 19902 is 3.

Also check out the Least Common Multiple of 19887 and 19902