Greatest Common Factor of 400, 651, 21

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

• Greatest Common Factor of 400, 651, 21 by common division method
• Greatest Common Factor of 400, 651, 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 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 651

List of positive integer factors of 651 that divides 651 without a remainder.

1,3,7,21,31,93,217,651

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 400,651,21 . The biggest common factor number is the GCF number.
So the greatest common factor 400,651,21 is 1.

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

• GCF of 381, 340, 27
• GCF of 828, 725, 34
• GCF of 195, 349, 98
• GCF of 420, 825, 77
• GCF of 494, 949, 32

1. What is the GCF of 400, 651, 21?

Answer: GCF of 400, 651, 21 is 1.

2. How to Find the GCF of 400, 651, 21

Answer: Greatest Common Factor(GCF) of 400, 651, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(400, 651, 21) = 1.