Greatest Common Factor of 45, 28, 90, 220

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

• Greatest Common Factor of 45, 28, 90, 220 by common division method
• Greatest Common Factor of 45, 28, 90, 220 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 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 220

List of positive integer factors of 220 that divides 220 without a remainder.

1,2,4,5,10,11,20,22,44,55,110,220

Greatest Common Factor

We found the factors 45,28,90,220 . The biggest common factor number is the GCF number.
So the greatest common factor 45,28,90,220 is 1.

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

• GCF of 39, 16, 51, 992
• GCF of 37, 85, 34, 322
• GCF of 33, 32, 21, 193
• GCF of 20, 57, 19, 450
• GCF of 61, 29, 27, 818

1. What is the GCF of 45, 28, 90, 220?

Answer: GCF of 45, 28, 90, 220 is 1.

2. How to Find the GCF of 45, 28, 90, 220

Answer: Greatest Common Factor(GCF) of 45, 28, 90, 220 = 1

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

Step 2: Then multiply all the prime factors GCF(45, 28, 90, 220) = 1.