Greatest Common Factor of 80, 75, 21, 438

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

• Greatest Common Factor of 80, 75, 21, 438 by common division method
• Greatest Common Factor of 80, 75, 21, 438 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 75

List of positive integer factors of 75 that divides 75 without a remainder.

1,3,5,15,25,75

Factors of 21

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

1,3,7,21

Factors of 438

List of positive integer factors of 438 that divides 438 without a remainder.

1,2,3,6,73,146,219,438

Greatest Common Factor

We found the factors 80,75,21,438 . The biggest common factor number is the GCF number.
So the greatest common factor 80,75,21,438 is 1.

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

• GCF of 42, 28, 39, 861
• GCF of 48, 68, 57, 312
• GCF of 20, 23, 82, 929
• GCF of 74, 83, 50, 277
• GCF of 98, 72, 35, 914

1. What is the GCF of 80, 75, 21, 438?

Answer: GCF of 80, 75, 21, 438 is 1.

2. How to Find the GCF of 80, 75, 21, 438

Answer: Greatest Common Factor(GCF) of 80, 75, 21, 438 = 1

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

Step 2: Then multiply all the prime factors GCF(80, 75, 21, 438) = 1.