Greatest Common Factor of 70, 21, 819

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

• Greatest Common Factor of 70, 21, 819 by common division method
• Greatest Common Factor of 70, 21, 819 with matching the biggest common factor

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∴ So the GCF of the given numbers is 7 = 7

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 21

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

1,3,7,21

Factors of 819

List of positive integer factors of 819 that divides 819 without a remainder.

1,3,7,9,13,21,39,63,91,117,273,819

Greatest Common Factor

We found the factors 70,21,819 . The biggest common factor number is the GCF number.
So the greatest common factor 70,21,819 is 7.

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

• GCF of 68, 13, 182
• GCF of 98, 79, 504
• GCF of 27, 13, 841
• GCF of 77, 28, 825
• GCF of 97, 46, 136

1. What is the GCF of 70, 21, 819?

Answer: GCF of 70, 21, 819 is 7.

2. How to Find the GCF of 70, 21, 819

Answer: Greatest Common Factor(GCF) of 70, 21, 819 = 7

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

Step 2: Then multiply all the prime factors GCF(70, 21, 819) = 7.