Greatest Common Factor of 21, 490, 784, 665

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

• Greatest Common Factor of 21, 490, 784, 665 by common division method
• Greatest Common Factor of 21, 490, 784, 665 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 7 = 7

Factors of 21

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

1,3,7,21

Factors of 490

List of positive integer factors of 490 that divides 490 without a remainder.

1,2,5,7,10,14,35,49,70,98,245,490

Factors of 784

List of positive integer factors of 784 that divides 784 without a remainder.

1,2,4,7,8,14,16,28,49,56,98,112,196,392,784

Factors of 665

List of positive integer factors of 665 that divides 665 without a remainder.

1,5,7,19,35,95,133,665

Greatest Common Factor

We found the factors 21,490,784,665 . The biggest common factor number is the GCF number.
So the greatest common factor 21,490,784,665 is 7.

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

• GCF of 27, 975, 860, 430
• GCF of 16, 340, 578, 903
• GCF of 13, 816, 949, 843
• GCF of 50, 460, 980, 442
• GCF of 26, 429, 953, 926

1. What is the GCF of 21, 490, 784, 665?

Answer: GCF of 21, 490, 784, 665 is 7.

2. How to Find the GCF of 21, 490, 784, 665

Answer: Greatest Common Factor(GCF) of 21, 490, 784, 665 = 7

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

Step 2: Then multiply all the prime factors GCF(21, 490, 784, 665) = 7.