Greatest Common Factor of 648, 231, 21

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

• Greatest Common Factor of 648, 231, 21 by common division method
• Greatest Common Factor of 648, 231, 21 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 231

List of positive integer factors of 231 that divides 231 without a remainder.

1,3,7,11,21,33,77,231

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 648,231,21 . The biggest common factor number is the GCF number.
So the greatest common factor 648,231,21 is 3.

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

• GCF of 588, 410, 83
• GCF of 857, 232, 51
• GCF of 820, 978, 36
• GCF of 662, 496, 35
• GCF of 896, 828, 64

1. What is the GCF of 648, 231, 21?

Answer: GCF of 648, 231, 21 is 3.

2. How to Find the GCF of 648, 231, 21

Answer: Greatest Common Factor(GCF) of 648, 231, 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, 231, 21) = 3.