Greatest Common Factor of 42, 21, 690, 144

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

• Greatest Common Factor of 42, 21, 690, 144 by common division method
• Greatest Common Factor of 42, 21, 690, 144 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 42

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

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

Factors of 21

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

1,3,7,21

Factors of 690

List of positive integer factors of 690 that divides 690 without a remainder.

1,2,3,5,6,10,15,23,30,46,69,115,138,230,345,690

Factors of 144

List of positive integer factors of 144 that divides 144 without a remainder.

1,2,3,4,6,8,9,12,16,18,24,36,48,72,144

Greatest Common Factor

We found the factors 42,21,690,144 . The biggest common factor number is the GCF number.
So the greatest common factor 42,21,690,144 is 3.

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

• GCF of 97, 14, 976, 811
• GCF of 72, 84, 900, 688
• GCF of 82, 77, 227, 998
• GCF of 93, 11, 759, 356
• GCF of 71, 13, 621, 781

1. What is the GCF of 42, 21, 690, 144?

Answer: GCF of 42, 21, 690, 144 is 3.

2. How to Find the GCF of 42, 21, 690, 144

Answer: Greatest Common Factor(GCF) of 42, 21, 690, 144 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 21, 690, 144) = 3.