Recall that the constant that comes next to a variable in an algebraic expression or equation is called a coefficient. If a constant is not next to a variable, then it is simply a constant. 
Now, if a term consists of more terms, then each term is called a factor. 
Answer: 
In the first term, 5 is a coefficient. 
In the second term, (3y+13) is a factor.
In the third term, -1 is a constant.