Greatest Common Factor of 21, 49, 13, 166

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

• Greatest Common Factor of 21, 49, 13, 166 by common division method
• Greatest Common Factor of 21, 49, 13, 166 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 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 13

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

1,13

Factors of 166

List of positive integer factors of 166 that divides 166 without a remainder.

1,2,83,166

Greatest Common Factor

We found the factors 21,49,13,166 . The biggest common factor number is the GCF number.
So the greatest common factor 21,49,13,166 is 1.

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

• GCF of 90, 23, 91, 312
• GCF of 81, 23, 20, 216
• GCF of 32, 90, 22, 221
• GCF of 26, 48, 85, 985
• GCF of 97, 85, 49, 146

1. What is the GCF of 21, 49, 13, 166?

Answer: GCF of 21, 49, 13, 166 is 1.

2. How to Find the GCF of 21, 49, 13, 166

Answer: Greatest Common Factor(GCF) of 21, 49, 13, 166 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 49, 13, 166) = 1.