Greatest Common Factor of 21, 80, 900

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

• Greatest Common Factor of 21, 80, 900 by common division method
• Greatest Common Factor of 21, 80, 900 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 900

List of positive integer factors of 900 that divides 900 without a remainder.

1,2,3,4,5,6,9,10,12,15,18,20,25,30,36,45,50,60,75,90,100,150,180,225,300,450,900

Greatest Common Factor

We found the factors 21,80,900 . The biggest common factor number is the GCF number.
So the greatest common factor 21,80,900 is 1.

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

• GCF of 44, 94, 257
• GCF of 60, 50, 362
• GCF of 25, 31, 132
• GCF of 45, 32, 124
• GCF of 18, 68, 246

1. What is the GCF of 21, 80, 900?

Answer: GCF of 21, 80, 900 is 1.

2. How to Find the GCF of 21, 80, 900

Answer: Greatest Common Factor(GCF) of 21, 80, 900 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 80, 900) = 1.