When a number has no common factors with another, they are called coprime, and an infinite number of such pairs exist. They include any pair involving a Prime number, but also such pairs as 12 and 25. It is a simple matter of the two numbers not having any common factors; there is no complicated technical description or proof required.
For a number to have common factors, there needs to be another number to compare its factors with.
All numbers have common factors.
When you are finding common factors, one method is to list the factors.
Short answer: There is none. There are not common factors of a single number because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. Thus, there cannot be a single number that has the greatest number of common factors.
In any set of common factors, the largest number is the GCF.
A single number cannot have common factors because "common" refers to factors that two or more numbers have in common. You have only one number.
A factor is a number by which another is exactly divisible. Every number has factors. Some numbers have the same factors as other numbers. Those are common factors. When comparing lists of common factors, the largest number is called the greatest common factor, or GCF.
Do you mean all the factors? I'm not sure what "common factors" is?
A factor of a number is a number that number can be divided by. For instance, 20 has the factors 1, 2, 4, 5, 10 and 20. 28 has the factors 1, 2, 4, 7, 14 and 28. Common factors are factors which appear in both lists. In this instance, 1, 2 and 4 are common factors of 20 and 28. The greatest common factor is the biggest number out of the common factors. In this case, 4 is the greatest common factor.
A factor is a number or quantity that when multiplied with another produces a given number or expression. Common factors are factors that two or more numbers have in common.
All of the factors of 26 are common with the factors of 52.
Three factors in common.