Greatest Common Factor of 20, 15, 81, 570

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

• Greatest Common Factor of 20, 15, 81, 570 by common division method
• Greatest Common Factor of 20, 15, 81, 570 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 15

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

1,3,5,15

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 570

List of positive integer factors of 570 that divides 570 without a remainder.

1,2,3,5,6,10,15,19,30,38,57,95,114,190,285,570

Greatest Common Factor

We found the factors 20,15,81,570 . The biggest common factor number is the GCF number.
So the greatest common factor 20,15,81,570 is 1.

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

• GCF of 21, 69, 55, 941
• GCF of 85, 97, 44, 306
• GCF of 69, 30, 96, 870
• GCF of 53, 37, 52, 358
• GCF of 68, 23, 47, 754

1. What is the GCF of 20, 15, 81, 570?

Answer: GCF of 20, 15, 81, 570 is 1.

2. How to Find the GCF of 20, 15, 81, 570

Answer: Greatest Common Factor(GCF) of 20, 15, 81, 570 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 15, 81, 570) = 1.