Greatest Common Factor of 59, 85, 18, 21

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

• Greatest Common Factor of 59, 85, 18, 21 by common division method
• Greatest Common Factor of 59, 85, 18, 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 59

List of positive integer factors of 59 that divides 59 without a remainder.

1,59

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

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

Greatest Common Factor

We found the factors 59,85,18,21 . The biggest common factor number is the GCF number.
So the greatest common factor 59,85,18,21 is 1.

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

• GCF of 19, 44, 26, 77
• GCF of 99, 18, 14, 60
• GCF of 91, 22, 70, 56
• GCF of 51, 61, 91, 57
• GCF of 71, 62, 84, 43

1. What is the GCF of 59, 85, 18, 21?

Answer: GCF of 59, 85, 18, 21 is 1.

2. How to Find the GCF of 59, 85, 18, 21

Answer: Greatest Common Factor(GCF) of 59, 85, 18, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(59, 85, 18, 21) = 1.