Greatest Common Factor of 18, 91, 70, 15

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

• Greatest Common Factor of 18, 91, 70, 15 by common division method
• Greatest Common Factor of 18, 91, 70, 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 18

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

1,2,3,6,9,18

Factors of 91

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

1,7,13,91

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

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 18,91,70,15 . The biggest common factor number is the GCF number.
So the greatest common factor 18,91,70,15 is 1.

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

• GCF of 13, 71, 50, 27
• GCF of 45, 71, 12, 64
• GCF of 31, 40, 43, 45
• GCF of 17, 68, 89, 63
• GCF of 67, 98, 32, 11

1. What is the GCF of 18, 91, 70, 15?

Answer: GCF of 18, 91, 70, 15 is 1.

2. How to Find the GCF of 18, 91, 70, 15

Answer: Greatest Common Factor(GCF) of 18, 91, 70, 15 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 91, 70, 15) = 1.