Greatest Common Factor of 81, 15, 642

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

• Greatest Common Factor of 81, 15, 642 by common division method
• Greatest Common Factor of 81, 15, 642 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 81

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

1,3,9,27,81

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 642

List of positive integer factors of 642 that divides 642 without a remainder.

1,2,3,6,107,214,321,642

Greatest Common Factor

We found the factors 81,15,642 . The biggest common factor number is the GCF number.
So the greatest common factor 81,15,642 is 3.

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

• GCF of 51, 12, 310
• GCF of 82, 39, 662
• GCF of 20, 17, 373
• GCF of 35, 70, 205
• GCF of 86, 92, 843

1. What is the GCF of 81, 15, 642?

Answer: GCF of 81, 15, 642 is 3.

2. How to Find the GCF of 81, 15, 642

Answer: Greatest Common Factor(GCF) of 81, 15, 642 = 3

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

Step 2: Then multiply all the prime factors GCF(81, 15, 642) = 3.