Greatest Common Factor of 21, 256, 139

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

• Greatest Common Factor of 21, 256, 139 by common division method
• Greatest Common Factor of 21, 256, 139 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 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 256

List of positive integer factors of 256 that divides 256 without a remainder.

1,2,4,8,16,32,64,128,256

Factors of 139

List of positive integer factors of 139 that divides 139 without a remainder.

1,139

Greatest Common Factor

We found the factors 21,256,139 . The biggest common factor number is the GCF number.
So the greatest common factor 21,256,139 is 1.

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

• GCF of 41, 678, 683
• GCF of 84, 590, 394
• GCF of 71, 666, 388
• GCF of 41, 544, 623
• GCF of 71, 495, 879

1. What is the GCF of 21, 256, 139?

Answer: GCF of 21, 256, 139 is 1.

2. How to Find the GCF of 21, 256, 139

Answer: Greatest Common Factor(GCF) of 21, 256, 139 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 256, 139) = 1.