Greatest Common Factor of 90, 81, 18, 123

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

• Greatest Common Factor of 90, 81, 18, 123 by common division method
• Greatest Common Factor of 90, 81, 18, 123 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 18

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

1,2,3,6,9,18

Factors of 123

List of positive integer factors of 123 that divides 123 without a remainder.

1,3,41,123

Greatest Common Factor

We found the factors 90,81,18,123 . The biggest common factor number is the GCF number.
So the greatest common factor 90,81,18,123 is 3.

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

• GCF of 90, 12, 58, 784
• GCF of 57, 44, 70, 389
• GCF of 15, 42, 44, 901
• GCF of 82, 90, 80, 781
• GCF of 95, 82, 93, 880

1. What is the GCF of 90, 81, 18, 123?

Answer: GCF of 90, 81, 18, 123 is 3.

2. How to Find the GCF of 90, 81, 18, 123

Answer: Greatest Common Factor(GCF) of 90, 81, 18, 123 = 3

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

Step 2: Then multiply all the prime factors GCF(90, 81, 18, 123) = 3.