Greatest Common Factor of 15, 21, 130

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

• Greatest Common Factor of 15, 21, 130 by common division method
• Greatest Common Factor of 15, 21, 130 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 15

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

1,3,5,15

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 130

List of positive integer factors of 130 that divides 130 without a remainder.

1,2,5,10,13,26,65,130

Greatest Common Factor

We found the factors 15,21,130 . The biggest common factor number is the GCF number.
So the greatest common factor 15,21,130 is 1.

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

• GCF of 86, 47, 572
• GCF of 65, 29, 863
• GCF of 55, 12, 398
• GCF of 16, 64, 337
• GCF of 46, 75, 210

1. What is the GCF of 15, 21, 130?

Answer: GCF of 15, 21, 130 is 1.

2. How to Find the GCF of 15, 21, 130

Answer: Greatest Common Factor(GCF) of 15, 21, 130 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 21, 130) = 1.