Greatest Common Factor of 15, 80, 21, 470

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

• Greatest Common Factor of 15, 80, 21, 470 by common division method
• Greatest Common Factor of 15, 80, 21, 470 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 21

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

1,3,7,21

Factors of 470

List of positive integer factors of 470 that divides 470 without a remainder.

1,2,5,10,47,94,235,470

Greatest Common Factor

We found the factors 15,80,21,470 . The biggest common factor number is the GCF number.
So the greatest common factor 15,80,21,470 is 1.

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

• GCF of 44, 47, 58, 612
• GCF of 36, 58, 18, 660
• GCF of 93, 73, 63, 290
• GCF of 68, 99, 69, 391
• GCF of 46, 29, 36, 189

1. What is the GCF of 15, 80, 21, 470?

Answer: GCF of 15, 80, 21, 470 is 1.

2. How to Find the GCF of 15, 80, 21, 470

Answer: Greatest Common Factor(GCF) of 15, 80, 21, 470 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 80, 21, 470) = 1.