Greatest Common Factor of 209, 415, 21

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

• Greatest Common Factor of 209, 415, 21 by common division method
• Greatest Common Factor of 209, 415, 21 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 209

List of positive integer factors of 209 that divides 209 without a remainder.

1,11,19,209

Factors of 415

List of positive integer factors of 415 that divides 415 without a remainder.

1,5,83,415

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 209,415,21 . The biggest common factor number is the GCF number.
So the greatest common factor 209,415,21 is 1.

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

• GCF of 721, 186, 43
• GCF of 335, 818, 83
• GCF of 201, 312, 41
• GCF of 779, 224, 25
• GCF of 570, 820, 14

1. What is the GCF of 209, 415, 21?

Answer: GCF of 209, 415, 21 is 1.

2. How to Find the GCF of 209, 415, 21

Answer: Greatest Common Factor(GCF) of 209, 415, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(209, 415, 21) = 1.