Greatest Common Factor of 15, 22, 90, 840

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

• Greatest Common Factor of 15, 22, 90, 840 by common division method
• Greatest Common Factor of 15, 22, 90, 840 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 22

List of positive integer factors of 22 that divides 22 without a remainder.

1,2,11,22

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 840

List of positive integer factors of 840 that divides 840 without a remainder.

1,2,3,4,5,6,7,8,10,12,14,15,20,21,24,28,30,35,40,42,56,60,70,84,105,120,140,168,210,280,420,840

Greatest Common Factor

We found the factors 15,22,90,840 . The biggest common factor number is the GCF number.
So the greatest common factor 15,22,90,840 is 1.

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

• GCF of 20, 93, 28, 245
• GCF of 78, 13, 61, 767
• GCF of 86, 32, 34, 723
• GCF of 34, 32, 88, 841
• GCF of 89, 96, 74, 461

1. What is the GCF of 15, 22, 90, 840?

Answer: GCF of 15, 22, 90, 840 is 1.

2. How to Find the GCF of 15, 22, 90, 840

Answer: Greatest Common Factor(GCF) of 15, 22, 90, 840 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 22, 90, 840) = 1.