Greatest Common Factor of 645, 863, 20

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

• Greatest Common Factor of 645, 863, 20 by common division method
• Greatest Common Factor of 645, 863, 20 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 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Factors of 863

List of positive integer factors of 863 that divides 863 without a remainder.

1,863

Factors of 20

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

1,2,4,5,10,20

Greatest Common Factor

We found the factors 645,863,20 . The biggest common factor number is the GCF number.
So the greatest common factor 645,863,20 is 1.

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

• GCF of 503, 227, 12
• GCF of 819, 803, 62
• GCF of 360, 409, 84
• GCF of 962, 915, 54
• GCF of 359, 149, 88

1. What is the GCF of 645, 863, 20?

Answer: GCF of 645, 863, 20 is 1.

2. How to Find the GCF of 645, 863, 20

Answer: Greatest Common Factor(GCF) of 645, 863, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(645, 863, 20) = 1.