Greatest Common Factor of 45, 21, 39, 42, 306

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

• Greatest Common Factor of 45, 21, 39, 42, 306 by common division method
• Greatest Common Factor of 45, 21, 39, 42, 306 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 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 21

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

1,3,7,21

Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 306

List of positive integer factors of 306 that divides 306 without a remainder.

1,2,3,6,9,17,18,34,51,102,153,306

Greatest Common Factor

We found the factors 45,21,39,42,306 . The biggest common factor number is the GCF number.
So the greatest common factor 45,21,39,42,306 is 3.

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

• GCF of 86, 42, 10, 35, 430
• GCF of 14, 76, 94, 29, 489
• GCF of 30, 40, 48, 94, 755
• GCF of 75, 15, 80, 33, 352
• GCF of 90, 96, 31, 72, 648

1. What is the GCF of 45, 21, 39, 42, 306?

Answer: GCF of 45, 21, 39, 42, 306 is 3.

2. How to Find the GCF of 45, 21, 39, 42, 306

Answer: Greatest Common Factor(GCF) of 45, 21, 39, 42, 306 = 3

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

Step 2: Then multiply all the prime factors GCF(45, 21, 39, 42, 306) = 3.