Greatest Common Factor of 15, 98, 78, 61, 397

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

• Greatest Common Factor of 15, 98, 78, 61, 397 by common division method
• Greatest Common Factor of 15, 98, 78, 61, 397 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 98

List of positive integer factors of 98 that divides 98 without a remainder.

1,2,7,14,49,98

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 397

List of positive integer factors of 397 that divides 397 without a remainder.

1,397

Greatest Common Factor

We found the factors 15,98,78,61,397 . The biggest common factor number is the GCF number.
So the greatest common factor 15,98,78,61,397 is 1.

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

• GCF of 35, 28, 67, 94, 975
• GCF of 52, 11, 35, 58, 484
• GCF of 45, 72, 31, 32, 673
• GCF of 13, 19, 37, 29, 780
• GCF of 23, 63, 19, 69, 695

1. What is the GCF of 15, 98, 78, 61, 397?

Answer: GCF of 15, 98, 78, 61, 397 is 1.

2. How to Find the GCF of 15, 98, 78, 61, 397

Answer: Greatest Common Factor(GCF) of 15, 98, 78, 61, 397 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 98, 78, 61, 397) = 1.