Greatest Common Factor of 21, 39, 70, 396

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

• Greatest Common Factor of 21, 39, 70, 396 by common division method
• Greatest Common Factor of 21, 39, 70, 396 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 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

Factors of 396

List of positive integer factors of 396 that divides 396 without a remainder.

1,2,3,4,6,9,11,12,18,22,33,36,44,66,99,132,198,396

Greatest Common Factor

We found the factors 21,39,70,396 . The biggest common factor number is the GCF number.
So the greatest common factor 21,39,70,396 is 1.

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

• GCF of 11, 75, 65, 302
• GCF of 22, 93, 36, 201
• GCF of 30, 48, 67, 405
• GCF of 24, 59, 31, 488
• GCF of 38, 39, 87, 451

1. What is the GCF of 21, 39, 70, 396?

Answer: GCF of 21, 39, 70, 396 is 1.

2. How to Find the GCF of 21, 39, 70, 396

Answer: Greatest Common Factor(GCF) of 21, 39, 70, 396 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 39, 70, 396) = 1.