What is the Greatest Common Factor of 19761 and 19770?

Greatest common factor (GCF) of 19761 and 19770 is 3.

GCF(19761,19770) = 3

We will now calculate the prime factors of 19761 and 19770, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19761 and 19770.

How to find the GCF of 19761 and 19770?

We will first find the prime factorization of 19761 and 19770. After we will calculate the factors of 19761 and 19770 and find the biggest common factor number .

Step-1: Prime Factorization of 19761

Prime factors of 19761 are 3, 7, 941. Prime factorization of 19761 in exponential form is:

19761 = 3¹ × 7¹ × 941¹

Step-2: Prime Factorization of 19770

Prime factors of 19770 are 2, 3, 5, 659. Prime factorization of 19770 in exponential form is:

19770 = 2¹ × 3¹ × 5¹ × 659¹

Step-3: Factors of 19761

List of positive integer factors of 19761 that divides 19761 without a remainder.

1, 3, 7, 21, 941, 2823, 6587

Step-4: Factors of 19770

List of positive integer factors of 19770 that divides 19761 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 659, 1318, 1977, 3295, 3954, 6590, 9885

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19761 and 19770. The biggest common factor number is the GCF number.
So the greatest common factor 19761 and 19770 is 3.

Also check out the Least Common Multiple of 19761 and 19770