What is the Greatest Common Factor of 21603 and 21608?

Greatest common factor (GCF) of 21603 and 21608 is 1.

GCF(21603,21608) = 1

We will now calculate the prime factors of 21603 and 21608, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21603 and 21608.

How to find the GCF of 21603 and 21608?

We will first find the prime factorization of 21603 and 21608. After we will calculate the factors of 21603 and 21608 and find the biggest common factor number .

Step-1: Prime Factorization of 21603

Prime factors of 21603 are 3, 19, 379. Prime factorization of 21603 in exponential form is:

21603 = 3¹ × 19¹ × 379¹

Step-2: Prime Factorization of 21608

Prime factors of 21608 are 2, 37, 73. Prime factorization of 21608 in exponential form is:

21608 = 2³ × 37¹ × 73¹

Step-3: Factors of 21603

List of positive integer factors of 21603 that divides 21603 without a remainder.

1, 3, 19, 57, 379, 1137, 7201

Step-4: Factors of 21608

List of positive integer factors of 21608 that divides 21603 without a remainder.

1, 2, 4, 8, 37, 73, 74, 146, 148, 292, 296, 584, 2701, 5402, 10804

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21603 and 21608. The biggest common factor number is the GCF number.
So the greatest common factor 21603 and 21608 is 1.

Also check out the Least Common Multiple of 21603 and 21608