Greatest Common Factor of 66, 70, 20, 421

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

• Greatest Common Factor of 66, 70, 20, 421 by common division method
• Greatest Common Factor of 66, 70, 20, 421 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 421

List of positive integer factors of 421 that divides 421 without a remainder.

1,421

Greatest Common Factor

We found the factors 66,70,20,421 . The biggest common factor number is the GCF number.
So the greatest common factor 66,70,20,421 is 1.

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

• GCF of 91, 76, 27, 357
• GCF of 90, 52, 59, 505
• GCF of 45, 78, 24, 394
• GCF of 26, 64, 71, 883
• GCF of 68, 22, 57, 810

1. What is the GCF of 66, 70, 20, 421?

Answer: GCF of 66, 70, 20, 421 is 1.

2. How to Find the GCF of 66, 70, 20, 421

Answer: Greatest Common Factor(GCF) of 66, 70, 20, 421 = 1

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

Step 2: Then multiply all the prime factors GCF(66, 70, 20, 421) = 1.