Greatest Common Factor of 384, 408, 21

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

• Greatest Common Factor of 384, 408, 21 by common division method
• Greatest Common Factor of 384, 408, 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 384

List of positive integer factors of 384 that divides 384 without a remainder.

1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,384

Factors of 408

List of positive integer factors of 408 that divides 408 without a remainder.

1,2,3,4,6,8,12,17,24,34,51,68,102,136,204,408

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 384,408,21 . The biggest common factor number is the GCF number.
So the greatest common factor 384,408,21 is 3.

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

• GCF of 105, 919, 51
• GCF of 374, 389, 56
• GCF of 365, 489, 48
• GCF of 570, 875, 35
• GCF of 692, 916, 42

1. What is the GCF of 384, 408, 21?

Answer: GCF of 384, 408, 21 is 3.

2. How to Find the GCF of 384, 408, 21

Answer: Greatest Common Factor(GCF) of 384, 408, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(384, 408, 21) = 3.