Greatest Common Factor of 21, 15, 240

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

• Greatest Common Factor of 21, 15, 240 by common division method
• Greatest Common Factor of 21, 15, 240 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 3 = 3

Factors of 21

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

1,3,7,21

Factors of 15

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

1,3,5,15

Factors of 240

List of positive integer factors of 240 that divides 240 without a remainder.

1,2,3,4,5,6,8,10,12,15,16,20,24,30,40,48,60,80,120,240

Greatest Common Factor

We found the factors 21,15,240 . The biggest common factor number is the GCF number.
So the greatest common factor 21,15,240 is 3.

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

• GCF of 17, 48, 694
• GCF of 55, 38, 888
• GCF of 39, 76, 343
• GCF of 27, 62, 496
• GCF of 94, 46, 369

1. What is the GCF of 21, 15, 240?

Answer: GCF of 21, 15, 240 is 3.

2. How to Find the GCF of 21, 15, 240

Answer: Greatest Common Factor(GCF) of 21, 15, 240 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 15, 240) = 3.