What is the Greatest Common Factor of 39905 and 39909?

Greatest common factor (GCF) of 39905 and 39909 is 1.

GCF(39905,39909) = 1

We will now calculate the prime factors of 39905 and 39909, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39905 and 39909.

How to find the GCF of 39905 and 39909?

We will first find the prime factorization of 39905 and 39909. After we will calculate the factors of 39905 and 39909 and find the biggest common factor number .

Step-1: Prime Factorization of 39905

Prime factors of 39905 are 5, 23, 347. Prime factorization of 39905 in exponential form is:

39905 = 5¹ × 23¹ × 347¹

Step-2: Prime Factorization of 39909

Prime factors of 39909 are 3, 53, 251. Prime factorization of 39909 in exponential form is:

39909 = 3¹ × 53¹ × 251¹

Step-3: Factors of 39905

List of positive integer factors of 39905 that divides 39905 without a remainder.

1, 5, 23, 115, 347, 1735, 7981

Step-4: Factors of 39909

List of positive integer factors of 39909 that divides 39905 without a remainder.

1, 3, 53, 159, 251, 753, 13303

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39905 and 39909. The biggest common factor number is the GCF number.
So the greatest common factor 39905 and 39909 is 1.

Also check out the Least Common Multiple of 39905 and 39909