4 of them.
None. Common factors refer to factors that are common to two or more numbers. You have only one.
7 has two factors, one and itself. For them to be common, they need to be compared to another set of factors.
For common factors to exist, there needs to be one or more numbers to compare the factors of.
In any list of distinct numbers, one will be greater than the others. In the list of common factors, one will be the greatest.
The factors of 17 are 1 and 17. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The common factor is 1. There is only one common factor.
For common factors to exist, there need to be more than one number to compare the factors.
When you are finding common factors, one method is to list the factors.
For common factors you need more than one number.
When two or more numbers each have one or more of the same factors, these factors are called common factors. A single number does not have common factors.
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.
There cannot be common factors of just one number. To be common there need to be at least two numbers.
There cannot be common factors of just one number. To be common there need to be at least two numbers.