Greatest Common Factor of 21, 45, 90, 497

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

• Greatest Common Factor of 21, 45, 90, 497 by common division method
• Greatest Common Factor of 21, 45, 90, 497 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 21

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

1,3,7,21

Factors of 45

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

1,3,5,9,15,45

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 497

List of positive integer factors of 497 that divides 497 without a remainder.

1,7,71,497

Greatest Common Factor

We found the factors 21,45,90,497 . The biggest common factor number is the GCF number.
So the greatest common factor 21,45,90,497 is 1.

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

• GCF of 96, 82, 66, 980
• GCF of 28, 27, 43, 753
• GCF of 55, 74, 53, 312
• GCF of 33, 42, 24, 407
• GCF of 28, 61, 68, 408

1. What is the GCF of 21, 45, 90, 497?

Answer: GCF of 21, 45, 90, 497 is 1.

2. How to Find the GCF of 21, 45, 90, 497

Answer: Greatest Common Factor(GCF) of 21, 45, 90, 497 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 45, 90, 497) = 1.