Greatest Common Factor of 21, 47, 87, 155

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

• Greatest Common Factor of 21, 47, 87, 155 by common division method
• Greatest Common Factor of 21, 47, 87, 155 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 21

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

1,3,7,21

Factors of 47

List of positive integer factors of 47 that divides 47 without a remainder.

1,47

Factors of 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 155

List of positive integer factors of 155 that divides 155 without a remainder.

1,5,31,155

Greatest Common Factor

We found the factors 21,47,87,155 . The biggest common factor number is the GCF number.
So the greatest common factor 21,47,87,155 is 1.

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

• GCF of 35, 69, 56, 712
• GCF of 73, 49, 10, 284
• GCF of 24, 47, 57, 181
• GCF of 31, 15, 44, 127
• GCF of 62, 89, 45, 169

1. What is the GCF of 21, 47, 87, 155?

Answer: GCF of 21, 47, 87, 155 is 1.

2. How to Find the GCF of 21, 47, 87, 155

Answer: Greatest Common Factor(GCF) of 21, 47, 87, 155 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 47, 87, 155) = 1.