Greatest Common Factor of 420, 621, 77

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

• Greatest Common Factor of 420, 621, 77 by common division method
• Greatest Common Factor of 420, 621, 77 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 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1,3,9,23,27,69,207,621

Factors of 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Greatest Common Factor

We found the factors 420,621,77 . The biggest common factor number is the GCF number.
So the greatest common factor 420,621,77 is 1.

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

• GCF of 298, 659, 98
• GCF of 219, 738, 54
• GCF of 790, 398, 45
• GCF of 608, 796, 54
• GCF of 639, 822, 40

1. What is the GCF of 420, 621, 77?

Answer: GCF of 420, 621, 77 is 1.

2. How to Find the GCF of 420, 621, 77

Answer: Greatest Common Factor(GCF) of 420, 621, 77 = 1

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

Step 2: Then multiply all the prime factors GCF(420, 621, 77) = 1.