Greatest Common Factor of 648, 414, 21

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

• Greatest Common Factor of 648, 414, 21 by common division method
• Greatest Common Factor of 648, 414, 21 with matching the biggest common factor

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

Factors of 648

List of positive integer factors of 648 that divides 648 without a remainder.

1,2,3,4,6,8,9,12,18,24,27,36,54,72,81,108,162,216,324,648

Factors of 414

List of positive integer factors of 414 that divides 414 without a remainder.

1,2,3,6,9,18,23,46,69,138,207,414

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 648,414,21 . The biggest common factor number is the GCF number.
So the greatest common factor 648,414,21 is 3.

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

• GCF of 709, 979, 70
• GCF of 154, 870, 50
• GCF of 776, 548, 42
• GCF of 401, 885, 20
• GCF of 703, 988, 16

1. What is the GCF of 648, 414, 21?

Answer: GCF of 648, 414, 21 is 3.

2. How to Find the GCF of 648, 414, 21

Answer: Greatest Common Factor(GCF) of 648, 414, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(648, 414, 21) = 3.