Greatest Common Factor of 21, 825, 638

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 21, 825, 638 by common division method
• Greatest Common Factor of 21, 825, 638 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 825

List of positive integer factors of 825 that divides 825 without a remainder.

1,3,5,11,15,25,33,55,75,165,275,825

Factors of 638

List of positive integer factors of 638 that divides 638 without a remainder.

1,2,11,22,29,58,319,638

Greatest Common Factor

We found the factors 21,825,638 . The biggest common factor number is the GCF number.
So the greatest common factor 21,825,638 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 70, 346, 129
• GCF of 32, 621, 586
• GCF of 83, 110, 764
• GCF of 94, 107, 668
• GCF of 11, 934, 618

1. What is the GCF of 21, 825, 638?

Answer: GCF of 21, 825, 638 is 1.

2. How to Find the GCF of 21, 825, 638

Answer: Greatest Common Factor(GCF) of 21, 825, 638 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(21, 825, 638) = 1.