Greatest Common Factor of 19, 21, 40, 55

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

• Greatest Common Factor of 19, 21, 40, 55 by common division method
• Greatest Common Factor of 19, 21, 40, 55 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 21

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

1,3,7,21

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

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

Factors of 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

Greatest Common Factor

We found the factors 19,21,40,55 . The biggest common factor number is the GCF number.
So the greatest common factor 19,21,40,55 is 1.

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

• GCF of 43, 11, 77, 16
• GCF of 72, 16, 30, 16
• GCF of 67, 70, 14, 96
• GCF of 39, 29, 88, 40
• GCF of 23, 39, 75, 11

1. What is the GCF of 19, 21, 40, 55?

Answer: GCF of 19, 21, 40, 55 is 1.

2. How to Find the GCF of 19, 21, 40, 55

Answer: Greatest Common Factor(GCF) of 19, 21, 40, 55 = 1

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

Step 2: Then multiply all the prime factors GCF(19, 21, 40, 55) = 1.