Greatest Common Factor of 28, 16, 20, 840

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

• Greatest Common Factor of 28, 16, 20, 840 by common division method
• Greatest Common Factor of 28, 16, 20, 840 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 2 x 2 = 4

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 20

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

1,2,4,5,10,20

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

Greatest Common Factor

We found the factors 28,16,20,840 . The biggest common factor number is the GCF number.
So the greatest common factor 28,16,20,840 is 4.

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

• GCF of 94, 48, 32, 172
• GCF of 98, 94, 82, 229
• GCF of 55, 42, 47, 281
• GCF of 96, 14, 15, 705
• GCF of 22, 38, 90, 916

1. What is the GCF of 28, 16, 20, 840?

Answer: GCF of 28, 16, 20, 840 is 4.

2. How to Find the GCF of 28, 16, 20, 840

Answer: Greatest Common Factor(GCF) of 28, 16, 20, 840 = 4

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

Step 2: Then multiply all the prime factors GCF(28, 16, 20, 840) = 4.