Greatest Common Factor of 30, 85, 21, 880

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

• Greatest Common Factor of 30, 85, 21, 880 by common division method
• Greatest Common Factor of 30, 85, 21, 880 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 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 21

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

1,3,7,21

Factors of 880

List of positive integer factors of 880 that divides 880 without a remainder.

1,2,4,5,8,10,11,16,20,22,40,44,55,80,88,110,176,220,440,880

Greatest Common Factor

We found the factors 30,85,21,880 . The biggest common factor number is the GCF number.
So the greatest common factor 30,85,21,880 is 1.

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

• GCF of 54, 75, 84, 484
• GCF of 59, 14, 82, 863
• GCF of 70, 97, 99, 906
• GCF of 34, 13, 64, 365
• GCF of 36, 95, 73, 857

1. What is the GCF of 30, 85, 21, 880?

Answer: GCF of 30, 85, 21, 880 is 1.

2. How to Find the GCF of 30, 85, 21, 880

Answer: Greatest Common Factor(GCF) of 30, 85, 21, 880 = 1

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

Step 2: Then multiply all the prime factors GCF(30, 85, 21, 880) = 1.