Greatest Common Factor of 20, 24, 72, 4, 49

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

• Greatest Common Factor of 20, 24, 72, 4, 49 by common division method
• Greatest Common Factor of 20, 24, 72, 4, 49 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 24

List of positive integer factors of 24 that divides 24 without a remainder.

1,2,3,4,6,8,12,24

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 4

List of positive integer factors of 4 that divides 4 without a remainder.

1,2,4

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Greatest Common Factor

We found the factors 20,24,72,4,49 . The biggest common factor number is the GCF number.
So the greatest common factor 20,24,72,4,49 is 1.

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

• GCF of 11, 25, 54, 3, 70
• GCF of 38, 84, 86, 3, 49
• GCF of 85, 61, 29, 5, 22
• GCF of 16, 84, 44, 8, 76
• GCF of 59, 31, 80, 8, 67

1. What is the GCF of 20, 24, 72, 4, 49?

Answer: GCF of 20, 24, 72, 4, 49 is 1.

2. How to Find the GCF of 20, 24, 72, 4, 49

Answer: Greatest Common Factor(GCF) of 20, 24, 72, 4, 49 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 24, 72, 4, 49) = 1.