Greatest Common Factor of 842, 400, 21

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

• Greatest Common Factor of 842, 400, 21 by common division method
• Greatest Common Factor of 842, 400, 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 842

List of positive integer factors of 842 that divides 842 without a remainder.

1,2,421,842

Factors of 400

List of positive integer factors of 400 that divides 400 without a remainder.

1,2,4,5,8,10,16,20,25,40,50,80,100,200,400

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 842,400,21 . The biggest common factor number is the GCF number.
So the greatest common factor 842,400,21 is 1.

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

• GCF of 562, 347, 88
• GCF of 543, 351, 27
• GCF of 149, 151, 90
• GCF of 497, 809, 85
• GCF of 466, 150, 69

1. What is the GCF of 842, 400, 21?

Answer: GCF of 842, 400, 21 is 1.

2. How to Find the GCF of 842, 400, 21

Answer: Greatest Common Factor(GCF) of 842, 400, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(842, 400, 21) = 1.