Greatest Common Factor of 31, 90, 91, 9, 15

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

• Greatest Common Factor of 31, 90, 91, 9, 15 by common division method
• Greatest Common Factor of 31, 90, 91, 9, 15 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 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

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 91

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

1,7,13,91

Factors of 9

List of positive integer factors of 9 that divides 9 without a remainder.

1,3,9

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Greatest Common Factor

We found the factors 31,90,91,9,15 . The biggest common factor number is the GCF number.
So the greatest common factor 31,90,91,9,15 is 1.

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

• GCF of 15, 22, 50, 1, 82
• GCF of 71, 78, 11, 4, 38
• GCF of 82, 56, 79, 6, 46
• GCF of 30, 58, 38, 9, 99
• GCF of 69, 65, 68, 2, 15

1. What is the GCF of 31, 90, 91, 9, 15?

Answer: GCF of 31, 90, 91, 9, 15 is 1.

2. How to Find the GCF of 31, 90, 91, 9, 15

Answer: Greatest Common Factor(GCF) of 31, 90, 91, 9, 15 = 1

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

Step 2: Then multiply all the prime factors GCF(31, 90, 91, 9, 15) = 1.