Greatest Common Factor of 21, 381, 209

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

• Greatest Common Factor of 21, 381, 209 by common division method
• Greatest Common Factor of 21, 381, 209 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 381

List of positive integer factors of 381 that divides 381 without a remainder.

1,3,127,381

Factors of 209

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

1,11,19,209

Greatest Common Factor

We found the factors 21,381,209 . The biggest common factor number is the GCF number.
So the greatest common factor 21,381,209 is 1.

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

• GCF of 28, 571, 842
• GCF of 14, 353, 762
• GCF of 94, 500, 492
• GCF of 62, 619, 828
• GCF of 81, 682, 391

1. What is the GCF of 21, 381, 209?

Answer: GCF of 21, 381, 209 is 1.

2. How to Find the GCF of 21, 381, 209

Answer: Greatest Common Factor(GCF) of 21, 381, 209 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 381, 209) = 1.