Greatest Common Factor of 18, 40, 643

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

• Greatest Common Factor of 18, 40, 643 by common division method
• Greatest Common Factor of 18, 40, 643 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 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 643

List of positive integer factors of 643 that divides 643 without a remainder.

1,643

Greatest Common Factor

We found the factors 18,40,643 . The biggest common factor number is the GCF number.
So the greatest common factor 18,40,643 is 1.

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

• GCF of 24, 82, 579
• GCF of 60, 14, 481
• GCF of 34, 22, 529
• GCF of 42, 20, 218
• GCF of 78, 16, 471

1. What is the GCF of 18, 40, 643?

Answer: GCF of 18, 40, 643 is 1.

2. How to Find the GCF of 18, 40, 643

Answer: Greatest Common Factor(GCF) of 18, 40, 643 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 40, 643) = 1.