Greatest Common Factor of 123, 681, 21

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

• Greatest Common Factor of 123, 681, 21 by common division method
• Greatest Common Factor of 123, 681, 21 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 123

List of positive integer factors of 123 that divides 123 without a remainder.

1,3,41,123

Factors of 681

List of positive integer factors of 681 that divides 681 without a remainder.

1,3,227,681

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 123,681,21 . The biggest common factor number is the GCF number.
So the greatest common factor 123,681,21 is 3.

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

• GCF of 890, 456, 97
• GCF of 483, 428, 92
• GCF of 106, 133, 70
• GCF of 230, 756, 97
• GCF of 273, 140, 38

1. What is the GCF of 123, 681, 21?

Answer: GCF of 123, 681, 21 is 3.

2. How to Find the GCF of 123, 681, 21

Answer: Greatest Common Factor(GCF) of 123, 681, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(123, 681, 21) = 3.