Greatest Common Factor of 391, 423, 18

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

• Greatest Common Factor of 391, 423, 18 by common division method
• Greatest Common Factor of 391, 423, 18 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 391

List of positive integer factors of 391 that divides 391 without a remainder.

1,17,23,391

Factors of 423

List of positive integer factors of 423 that divides 423 without a remainder.

1,3,9,47,141,423

Factors of 18

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

1,2,3,6,9,18

Greatest Common Factor

We found the factors 391,423,18 . The biggest common factor number is the GCF number.
So the greatest common factor 391,423,18 is 1.

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

• GCF of 915, 147, 99
• GCF of 594, 447, 42
• GCF of 391, 878, 86
• GCF of 149, 967, 73
• GCF of 233, 557, 99

1. What is the GCF of 391, 423, 18?

Answer: GCF of 391, 423, 18 is 1.

2. How to Find the GCF of 391, 423, 18

Answer: Greatest Common Factor(GCF) of 391, 423, 18 = 1

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

Step 2: Then multiply all the prime factors GCF(391, 423, 18) = 1.