Greatest Common Factor of 18, 21, 35, 820

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

• Greatest Common Factor of 18, 21, 35, 820 by common division method
• Greatest Common Factor of 18, 21, 35, 820 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 35

List of positive integer factors of 35 that divides 35 without a remainder.

1,5,7,35

Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Greatest Common Factor

We found the factors 18,21,35,820 . The biggest common factor number is the GCF number.
So the greatest common factor 18,21,35,820 is 1.

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

• GCF of 87, 99, 95, 532
• GCF of 27, 66, 96, 716
• GCF of 68, 77, 20, 502
• GCF of 31, 41, 53, 608
• GCF of 75, 31, 85, 394

1. What is the GCF of 18, 21, 35, 820?

Answer: GCF of 18, 21, 35, 820 is 1.

2. How to Find the GCF of 18, 21, 35, 820

Answer: Greatest Common Factor(GCF) of 18, 21, 35, 820 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 21, 35, 820) = 1.