Greatest Common Factor of 840, 128, 81

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

• Greatest Common Factor of 840, 128, 81 by common division method
• Greatest Common Factor of 840, 128, 81 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

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 128

List of positive integer factors of 128 that divides 128 without a remainder.

1,2,4,8,16,32,64,128

Factors of 81

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

1,3,9,27,81

Greatest Common Factor

We found the factors 840,128,81 . The biggest common factor number is the GCF number.
So the greatest common factor 840,128,81 is 1.

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

• GCF of 672, 144, 88
• GCF of 120, 962, 81
• GCF of 265, 877, 17
• GCF of 770, 311, 95
• GCF of 252, 672, 32

1. What is the GCF of 840, 128, 81?

Answer: GCF of 840, 128, 81 is 1.

2. How to Find the GCF of 840, 128, 81

Answer: Greatest Common Factor(GCF) of 840, 128, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(840, 128, 81) = 1.