Greatest Common Factor of 90, 87, 40, 91, 72

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

• Greatest Common Factor of 90, 87, 40, 91, 72 by common division method
• Greatest Common Factor of 90, 87, 40, 91, 72 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 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 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Greatest Common Factor

We found the factors 90,87,40,91,72 . The biggest common factor number is the GCF number.
So the greatest common factor 90,87,40,91,72 is 1.

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

• GCF of 42, 97, 62, 95, 98
• GCF of 12, 22, 84, 92, 20
• GCF of 47, 84, 87, 82, 90
• GCF of 19, 14, 75, 77, 25
• GCF of 30, 64, 30, 87, 23

1. What is the GCF of 90, 87, 40, 91, 72?

Answer: GCF of 90, 87, 40, 91, 72 is 1.

2. How to Find the GCF of 90, 87, 40, 91, 72

Answer: Greatest Common Factor(GCF) of 90, 87, 40, 91, 72 = 1

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

Step 2: Then multiply all the prime factors GCF(90, 87, 40, 91, 72) = 1.