Greatest Common Factor of 783, 786, 21

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

• Greatest Common Factor of 783, 786, 21 by common division method
• Greatest Common Factor of 783, 786, 21 with matching the biggest common factor

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

Factors of 783

List of positive integer factors of 783 that divides 783 without a remainder.

1,3,9,27,29,87,261,783

Factors of 786

List of positive integer factors of 786 that divides 786 without a remainder.

1,2,3,6,131,262,393,786

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 783,786,21 . The biggest common factor number is the GCF number.
So the greatest common factor 783,786,21 is 3.

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

• GCF of 959, 636, 59
• GCF of 358, 449, 27
• GCF of 637, 634, 60
• GCF of 829, 349, 81
• GCF of 187, 142, 38

1. What is the GCF of 783, 786, 21?

Answer: GCF of 783, 786, 21 is 3.

2. How to Find the GCF of 783, 786, 21

Answer: Greatest Common Factor(GCF) of 783, 786, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(783, 786, 21) = 3.