What is the Greatest Common Factor of 1904 and 1921?

Greatest common factor (GCF) of 1904 and 1921 is 17.

GCF(1904,1921) = 17

We will now calculate the prime factors of 1904 and 1921, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1904 and 1921.

How to find the GCF of 1904 and 1921?

We will first find the prime factorization of 1904 and 1921. After we will calculate the factors of 1904 and 1921 and find the biggest common factor number .

Step-1: Prime Factorization of 1904

Prime factors of 1904 are 2, 7, 17. Prime factorization of 1904 in exponential form is:

1904 = 2⁴ × 7¹ × 17¹

Step-2: Prime Factorization of 1921

Prime factors of 1921 are 17, 113. Prime factorization of 1921 in exponential form is:

1921 = 17¹ × 113¹

Step-3: Factors of 1904

List of positive integer factors of 1904 that divides 1904 without a remainder.

1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 112, 119, 136, 238, 272, 476, 952

Step-4: Factors of 1921

List of positive integer factors of 1921 that divides 1904 without a remainder.

1, 17, 113

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1904 and 1921. The biggest common factor number is the GCF number.
So the greatest common factor 1904 and 1921 is 17.

Also check out the Least Common Multiple of 1904 and 1921