Greatest Common Factor of 21, 51, 345

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

• Greatest Common Factor of 21, 51, 345 by common division method
• Greatest Common Factor of 21, 51, 345 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 21

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

1,3,7,21

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Factors of 345

List of positive integer factors of 345 that divides 345 without a remainder.

1,3,5,15,23,69,115,345

Greatest Common Factor

We found the factors 21,51,345 . The biggest common factor number is the GCF number.
So the greatest common factor 21,51,345 is 3.

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

• GCF of 25, 12, 762
• GCF of 91, 94, 401
• GCF of 77, 63, 232
• GCF of 38, 88, 872
• GCF of 17, 16, 757

1. What is the GCF of 21, 51, 345?

Answer: GCF of 21, 51, 345 is 3.

2. How to Find the GCF of 21, 51, 345

Answer: Greatest Common Factor(GCF) of 21, 51, 345 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 51, 345) = 3.