Greatest Common Factor of 21, 30, 234, 780

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

• Greatest Common Factor of 21, 30, 234, 780 by common division method
• Greatest Common Factor of 21, 30, 234, 780 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 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 234

List of positive integer factors of 234 that divides 234 without a remainder.

1,2,3,6,9,13,18,26,39,78,117,234

Factors of 780

List of positive integer factors of 780 that divides 780 without a remainder.

1,2,3,4,5,6,10,12,13,15,20,26,30,39,52,60,65,78,130,156,195,260,390,780

Greatest Common Factor

We found the factors 21,30,234,780 . The biggest common factor number is the GCF number.
So the greatest common factor 21,30,234,780 is 3.

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

• GCF of 95, 80, 380, 436
• GCF of 27, 56, 915, 337
• GCF of 96, 21, 449, 591
• GCF of 73, 20, 594, 442
• GCF of 61, 85, 177, 904

1. What is the GCF of 21, 30, 234, 780?

Answer: GCF of 21, 30, 234, 780 is 3.

2. How to Find the GCF of 21, 30, 234, 780

Answer: Greatest Common Factor(GCF) of 21, 30, 234, 780 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 30, 234, 780) = 3.