Greatest Common Factor of 21, 69, 42, 258

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

• Greatest Common Factor of 21, 69, 42, 258 by common division method
• Greatest Common Factor of 21, 69, 42, 258 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 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

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 258

List of positive integer factors of 258 that divides 258 without a remainder.

1,2,3,6,43,86,129,258

Greatest Common Factor

We found the factors 21,69,42,258 . The biggest common factor number is the GCF number.
So the greatest common factor 21,69,42,258 is 3.

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

• GCF of 68, 70, 35, 424
• GCF of 91, 99, 90, 491
• GCF of 37, 78, 67, 342
• GCF of 53, 87, 77, 665
• GCF of 16, 12, 97, 255

1. What is the GCF of 21, 69, 42, 258?

Answer: GCF of 21, 69, 42, 258 is 3.

2. How to Find the GCF of 21, 69, 42, 258

Answer: Greatest Common Factor(GCF) of 21, 69, 42, 258 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 69, 42, 258) = 3.