Greatest Common Factor of 18, 397, 420

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

• Greatest Common Factor of 18, 397, 420 by common division method
• Greatest Common Factor of 18, 397, 420 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 397

List of positive integer factors of 397 that divides 397 without a remainder.

1,397

Factors of 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Greatest Common Factor

We found the factors 18,397,420 . The biggest common factor number is the GCF number.
So the greatest common factor 18,397,420 is 1.

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

• GCF of 83, 391, 671
• GCF of 49, 426, 301
• GCF of 72, 647, 806
• GCF of 14, 733, 771
• GCF of 70, 368, 839

1. What is the GCF of 18, 397, 420?

Answer: GCF of 18, 397, 420 is 1.

2. How to Find the GCF of 18, 397, 420

Answer: Greatest Common Factor(GCF) of 18, 397, 420 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 397, 420) = 1.