Greatest Common Factor of 21, 20, 12, 850

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

• Greatest Common Factor of 21, 20, 12, 850 by common division method
• Greatest Common Factor of 21, 20, 12, 850 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 850

List of positive integer factors of 850 that divides 850 without a remainder.

1,2,5,10,17,25,34,50,85,170,425,850

Greatest Common Factor

We found the factors 21,20,12,850 . The biggest common factor number is the GCF number.
So the greatest common factor 21,20,12,850 is 1.

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

• GCF of 25, 40, 30, 338
• GCF of 91, 82, 19, 191
• GCF of 83, 25, 27, 486
• GCF of 27, 52, 16, 701
• GCF of 14, 44, 40, 326

1. What is the GCF of 21, 20, 12, 850?

Answer: GCF of 21, 20, 12, 850 is 1.

2. How to Find the GCF of 21, 20, 12, 850

Answer: Greatest Common Factor(GCF) of 21, 20, 12, 850 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 20, 12, 850) = 1.