Greatest Common Factor of 821, 399, 680

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

• Greatest Common Factor of 821, 399, 680 by common division method
• Greatest Common Factor of 821, 399, 680 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 821

List of positive integer factors of 821 that divides 821 without a remainder.

1,821

Factors of 399

List of positive integer factors of 399 that divides 399 without a remainder.

1,3,7,19,21,57,133,399

Factors of 680

List of positive integer factors of 680 that divides 680 without a remainder.

1,2,4,5,8,10,17,20,34,40,68,85,136,170,340,680

Greatest Common Factor

We found the factors 821,399,680 . The biggest common factor number is the GCF number.
So the greatest common factor 821,399,680 is 1.

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

• GCF of 857, 649, 355
• GCF of 199, 512, 178
• GCF of 492, 473, 232
• GCF of 745, 703, 910
• GCF of 807, 334, 411

1. What is the GCF of 821, 399, 680?

Answer: GCF of 821, 399, 680 is 1.

2. How to Find the GCF of 821, 399, 680

Answer: Greatest Common Factor(GCF) of 821, 399, 680 = 1

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

Step 2: Then multiply all the prime factors GCF(821, 399, 680) = 1.