Greatest Common Factor of 855, 936, 21

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

• Greatest Common Factor of 855, 936, 21 by common division method
• Greatest Common Factor of 855, 936, 21 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 855

List of positive integer factors of 855 that divides 855 without a remainder.

1,3,5,9,15,19,45,57,95,171,285,855

Factors of 936

List of positive integer factors of 936 that divides 936 without a remainder.

1,2,3,4,6,8,9,12,13,18,24,26,36,39,52,72,78,104,117,156,234,312,468,936

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 855,936,21 . The biggest common factor number is the GCF number.
So the greatest common factor 855,936,21 is 3.

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

• GCF of 935, 726, 90
• GCF of 691, 730, 81
• GCF of 194, 172, 26
• GCF of 818, 779, 55
• GCF of 666, 790, 23

1. What is the GCF of 855, 936, 21?

Answer: GCF of 855, 936, 21 is 3.

2. How to Find the GCF of 855, 936, 21

Answer: Greatest Common Factor(GCF) of 855, 936, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(855, 936, 21) = 3.