What is the Greatest Common Factor of 21397 and 21408?

Greatest common factor (GCF) of 21397 and 21408 is 1.

GCF(21397,21408) = 1

We will now calculate the prime factors of 21397 and 21408, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21397 and 21408.

How to find the GCF of 21397 and 21408?

We will first find the prime factorization of 21397 and 21408. After we will calculate the factors of 21397 and 21408 and find the biggest common factor number .

Step-1: Prime Factorization of 21397

Prime factors of 21397 are 21397. Prime factorization of 21397 in exponential form is:

21397 = 21397¹

Step-2: Prime Factorization of 21408

Prime factors of 21408 are 2, 3, 223. Prime factorization of 21408 in exponential form is:

21408 = 2⁵ × 3¹ × 223¹

Step-3: Factors of 21397

List of positive integer factors of 21397 that divides 21397 without a remainder.

Step-4: Factors of 21408

List of positive integer factors of 21408 that divides 21397 without a remainder.

1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96, 223, 446, 669, 892, 1338, 1784, 2676, 3568, 5352, 7136, 10704

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21397 and 21408. The biggest common factor number is the GCF number.
So the greatest common factor 21397 and 21408 is 1.

Also check out the Least Common Multiple of 21397 and 21408