Greatest Common Factor of 70, 61, 15, 13

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

• Greatest Common Factor of 70, 61, 15, 13 by common division method
• Greatest Common Factor of 70, 61, 15, 13 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 70

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

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

Factors of 61

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

1,61

Factors of 15

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

1,3,5,15

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Greatest Common Factor

We found the factors 70,61,15,13 . The biggest common factor number is the GCF number.
So the greatest common factor 70,61,15,13 is 1.

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

• GCF of 97, 55, 40, 88
• GCF of 93, 21, 87, 69
• GCF of 72, 77, 90, 68
• GCF of 17, 20, 39, 11
• GCF of 10, 94, 22, 50

1. What is the GCF of 70, 61, 15, 13?

Answer: GCF of 70, 61, 15, 13 is 1.

2. How to Find the GCF of 70, 61, 15, 13

Answer: Greatest Common Factor(GCF) of 70, 61, 15, 13 = 1

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

Step 2: Then multiply all the prime factors GCF(70, 61, 15, 13) = 1.