No. You will always wind up with the same set.
No. It doesn't matter what factors you choose at the beginning, but all the factors should be prime at the end.
the answer is what ever number you choose you have to times it by itself to get a square number.
No. Every composite number has a unique prime factorization.
A friendly number is a number that has a lot of factors depending on the size of the number. For example, eight is a friendly number. Its factors are 8,4,2,1. 7 isn't because its only factors are 7 and 1.
No, as long as you don't choose one and the number itself.
It's the one with more than two factors.
Depending on your definition of proper factors, the set of proper factor factors either doesn't include 1 and/or the number itself for a given number.
To choose a number that is relatively prime to any other number, you need to select a number that has no common factors (other than 1) with those other numbers. One way to ensure this is to choose a prime number. Prime numbers only have two factors: 1 and itself, making them relatively prime to any other number.
"Factors" are multiplied, not added. Choose any number (except zero) for the first factor. Then divide -9 by that number to get the second factor.
Four to eight, depending on a number of factors.
We can't answer this accurately if you don't tell us the groups to choose from.
Simply multiply four prime numbers with one another. If your number is too large, choose smaller factors. If your number is too small, choose larger factors. One possibility is 7 x 7 x 7 x 7. Other combinations are possible as well.