Greatest Common Factor of 13, 61, 21, 798

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

• Greatest Common Factor of 13, 61, 21, 798 by common division method
• Greatest Common Factor of 13, 61, 21, 798 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 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 21

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

1,3,7,21

Factors of 798

List of positive integer factors of 798 that divides 798 without a remainder.

1,2,3,6,7,14,19,21,38,42,57,114,133,266,399,798

Greatest Common Factor

We found the factors 13,61,21,798 . The biggest common factor number is the GCF number.
So the greatest common factor 13,61,21,798 is 1.

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

• GCF of 80, 28, 43, 386
• GCF of 74, 56, 48, 258
• GCF of 88, 77, 75, 714
• GCF of 90, 63, 83, 522
• GCF of 66, 71, 38, 855

1. What is the GCF of 13, 61, 21, 798?

Answer: GCF of 13, 61, 21, 798 is 1.

2. How to Find the GCF of 13, 61, 21, 798

Answer: Greatest Common Factor(GCF) of 13, 61, 21, 798 = 1

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

Step 2: Then multiply all the prime factors GCF(13, 61, 21, 798) = 1.