Greatest Common Factor of 840, 786, 20

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

• Greatest Common Factor of 840, 786, 20 by common division method
• Greatest Common Factor of 840, 786, 20 with matching the biggest common factor

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∴ So the GCF of the given numbers is 2 = 2

Factors of 840

List of positive integer factors of 840 that divides 840 without a remainder.

1,2,3,4,5,6,7,8,10,12,14,15,20,21,24,28,30,35,40,42,56,60,70,84,105,120,140,168,210,280,420,840

Factors of 786

List of positive integer factors of 786 that divides 786 without a remainder.

1,2,3,6,131,262,393,786

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 840,786,20 . The biggest common factor number is the GCF number.
So the greatest common factor 840,786,20 is 2.

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

• GCF of 955, 732, 55
• GCF of 402, 700, 51
• GCF of 876, 960, 91
• GCF of 294, 117, 31
• GCF of 775, 902, 54

1. What is the GCF of 840, 786, 20?

Answer: GCF of 840, 786, 20 is 2.

2. How to Find the GCF of 840, 786, 20

Answer: Greatest Common Factor(GCF) of 840, 786, 20 = 2

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

Step 2: Then multiply all the prime factors GCF(840, 786, 20) = 2.