Greatest Common Factor of 645, 561, 972

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

• Greatest Common Factor of 645, 561, 972 by common division method
• Greatest Common Factor of 645, 561, 972 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

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 561

List of positive integer factors of 561 that divides 561 without a remainder.

1,3,11,17,33,51,187,561

Factors of 972

List of positive integer factors of 972 that divides 972 without a remainder.

1,2,3,4,6,9,12,18,27,36,54,81,108,162,243,324,486,972

Greatest Common Factor

We found the factors 645,561,972 . The biggest common factor number is the GCF number.
So the greatest common factor 645,561,972 is 3.

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

• GCF of 634, 638, 672
• GCF of 319, 526, 950
• GCF of 496, 130, 562
• GCF of 528, 689, 455
• GCF of 920, 409, 985

1. What is the GCF of 645, 561, 972?

Answer: GCF of 645, 561, 972 is 3.

2. How to Find the GCF of 645, 561, 972

Answer: Greatest Common Factor(GCF) of 645, 561, 972 = 3

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

Step 2: Then multiply all the prime factors GCF(645, 561, 972) = 3.