Greatest Common Factor of 21, 997, 400

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

• Greatest Common Factor of 21, 997, 400 by common division method
• Greatest Common Factor of 21, 997, 400 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 997

List of positive integer factors of 997 that divides 997 without a remainder.

1,997

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

Greatest Common Factor

We found the factors 21,997,400 . The biggest common factor number is the GCF number.
So the greatest common factor 21,997,400 is 1.

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

• GCF of 36, 227, 387
• GCF of 60, 320, 419
• GCF of 70, 182, 981
• GCF of 40, 260, 511
• GCF of 70, 483, 424

1. What is the GCF of 21, 997, 400?

Answer: GCF of 21, 997, 400 is 1.

2. How to Find the GCF of 21, 997, 400

Answer: Greatest Common Factor(GCF) of 21, 997, 400 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 997, 400) = 1.