Greatest Common Factor of 505, 872, 21

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

• Greatest Common Factor of 505, 872, 21 by common division method
• Greatest Common Factor of 505, 872, 21 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 505

List of positive integer factors of 505 that divides 505 without a remainder.

1,5,101,505

Factors of 872

List of positive integer factors of 872 that divides 872 without a remainder.

1,2,4,8,109,218,436,872

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 505,872,21 . The biggest common factor number is the GCF number.
So the greatest common factor 505,872,21 is 1.

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

• GCF of 252, 920, 58
• GCF of 142, 256, 41
• GCF of 308, 937, 86
• GCF of 402, 742, 77
• GCF of 728, 238, 16

1. What is the GCF of 505, 872, 21?

Answer: GCF of 505, 872, 21 is 1.

2. How to Find the GCF of 505, 872, 21

Answer: Greatest Common Factor(GCF) of 505, 872, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(505, 872, 21) = 1.