Greatest Common Factor of 18, 20, 90, 399

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

• Greatest Common Factor of 18, 20, 90, 399 by common division method
• Greatest Common Factor of 18, 20, 90, 399 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 399

List of positive integer factors of 399 that divides 399 without a remainder.

1,3,7,19,21,57,133,399

Greatest Common Factor

We found the factors 18,20,90,399 . The biggest common factor number is the GCF number.
So the greatest common factor 18,20,90,399 is 1.

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

• GCF of 37, 32, 12, 590
• GCF of 77, 22, 51, 653
• GCF of 41, 46, 35, 345
• GCF of 35, 53, 31, 798
• GCF of 66, 68, 98, 551

1. What is the GCF of 18, 20, 90, 399?

Answer: GCF of 18, 20, 90, 399 is 1.

2. How to Find the GCF of 18, 20, 90, 399

Answer: Greatest Common Factor(GCF) of 18, 20, 90, 399 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 20, 90, 399) = 1.