What is the Greatest Common Factor of 25209 and 25221?

Greatest common factor (GCF) of 25209 and 25221 is 3.

GCF(25209,25221) = 3

We will now calculate the prime factors of 25209 and 25221, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25209 and 25221.

How to find the GCF of 25209 and 25221?

We will first find the prime factorization of 25209 and 25221. After we will calculate the factors of 25209 and 25221 and find the biggest common factor number .

Step-1: Prime Factorization of 25209

Prime factors of 25209 are 3, 2801. Prime factorization of 25209 in exponential form is:

25209 = 3² × 2801¹

Step-2: Prime Factorization of 25221

Prime factors of 25221 are 3, 7, 1201. Prime factorization of 25221 in exponential form is:

25221 = 3¹ × 7¹ × 1201¹

Step-3: Factors of 25209

List of positive integer factors of 25209 that divides 25209 without a remainder.

1, 3, 9, 2801, 8403

Step-4: Factors of 25221

List of positive integer factors of 25221 that divides 25209 without a remainder.

1, 3, 7, 21, 1201, 3603, 8407

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25209 and 25221. The biggest common factor number is the GCF number.
So the greatest common factor 25209 and 25221 is 3.

Also check out the Least Common Multiple of 25209 and 25221