What is the Greatest Common Factor of 19551 and 19565?

Greatest common factor (GCF) of 19551 and 19565 is 7.

GCF(19551,19565) = 7

We will now calculate the prime factors of 19551 and 19565, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19551 and 19565.

How to find the GCF of 19551 and 19565?

We will first find the prime factorization of 19551 and 19565. After we will calculate the factors of 19551 and 19565 and find the biggest common factor number .

Step-1: Prime Factorization of 19551

Prime factors of 19551 are 3, 7, 19. Prime factorization of 19551 in exponential form is:

19551 = 3¹ × 7³ × 19¹

Step-2: Prime Factorization of 19565

Prime factors of 19565 are 5, 7, 13, 43. Prime factorization of 19565 in exponential form is:

19565 = 5¹ × 7¹ × 13¹ × 43¹

Step-3: Factors of 19551

List of positive integer factors of 19551 that divides 19551 without a remainder.

1, 3, 7, 19, 21, 49, 57, 133, 147, 343, 399, 931, 1029, 2793, 6517

Step-4: Factors of 19565

List of positive integer factors of 19565 that divides 19551 without a remainder.

1, 5, 7, 13, 35, 43, 65, 91, 215, 301, 455, 559, 1505, 2795, 3913

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19551 and 19565. The biggest common factor number is the GCF number.
So the greatest common factor 19551 and 19565 is 7.

Also check out the Least Common Multiple of 19551 and 19565