Greatest Common Factor of 18, 42, 65, 390

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

• Greatest Common Factor of 18, 42, 65, 390 by common division method
• Greatest Common Factor of 18, 42, 65, 390 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

Greatest Common Factor

We found the factors 18,42,65,390 . The biggest common factor number is the GCF number.
So the greatest common factor 18,42,65,390 is 1.

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

• GCF of 62, 32, 16, 575
• GCF of 88, 27, 24, 366
• GCF of 87, 50, 44, 758
• GCF of 45, 75, 12, 891
• GCF of 65, 45, 35, 570

1. What is the GCF of 18, 42, 65, 390?

Answer: GCF of 18, 42, 65, 390 is 1.

2. How to Find the GCF of 18, 42, 65, 390

Answer: Greatest Common Factor(GCF) of 18, 42, 65, 390 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 42, 65, 390) = 1.