Greatest Common Factor of 21, 81, 75, 357

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

• Greatest Common Factor of 21, 81, 75, 357 by common division method
• Greatest Common Factor of 21, 81, 75, 357 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 75

List of positive integer factors of 75 that divides 75 without a remainder.

1,3,5,15,25,75

Factors of 357

List of positive integer factors of 357 that divides 357 without a remainder.

1,3,7,17,21,51,119,357

Greatest Common Factor

We found the factors 21,81,75,357 . The biggest common factor number is the GCF number.
So the greatest common factor 21,81,75,357 is 3.

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

• GCF of 77, 38, 38, 706
• GCF of 27, 42, 27, 481
• GCF of 83, 59, 57, 729
• GCF of 38, 17, 37, 434
• GCF of 95, 75, 93, 540

1. What is the GCF of 21, 81, 75, 357?

Answer: GCF of 21, 81, 75, 357 is 3.

2. How to Find the GCF of 21, 81, 75, 357

Answer: Greatest Common Factor(GCF) of 21, 81, 75, 357 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 81, 75, 357) = 3.