Greatest Common Factor of 843, 689, 21

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

• Greatest Common Factor of 843, 689, 21 by common division method
• Greatest Common Factor of 843, 689, 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 843

List of positive integer factors of 843 that divides 843 without a remainder.

1,3,281,843

Factors of 689

List of positive integer factors of 689 that divides 689 without a remainder.

1,13,53,689

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 843,689,21 . The biggest common factor number is the GCF number.
So the greatest common factor 843,689,21 is 1.

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

• GCF of 490, 488, 76
• GCF of 968, 573, 61
• GCF of 379, 643, 16
• GCF of 188, 185, 36
• GCF of 761, 988, 95

1. What is the GCF of 843, 689, 21?

Answer: GCF of 843, 689, 21 is 1.

2. How to Find the GCF of 843, 689, 21

Answer: Greatest Common Factor(GCF) of 843, 689, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(843, 689, 21) = 1.