possible combination of a number

Hi, I am seeking help to find all possible combination of number in Matlab. Cosider A=[1,2,......50]; B=[50,49,.....1]; Conditions A*B=50;

Then A1 and B1 will new values based on the condition. A1=[1,2,5,10,25,50] B1=[50,25,5,2,1] How I can solve this in Matlab.

Thank you.

Answer 1

[John D'Errico]

The trivial solution:

loc = A.*B == 50;
A1 = A(loc);
B1 = B(loc);

No, I won't show you how to solve this for significantly LARGE numbers, since you need to learn MATLAB, and how to use the tools in MATLAB to advantage. If I write basic code for you, then you learn nothing.

So you need to learn to use tools like factor. Once you have the factors of a number, you can create a list of all distinct integer divisors.

What property do all divisors of the number 1234567890 have? Think about how this will help you:

factor(1234567890)
ans =
     2    3    3    5   3607   3803

What can you do with that list?

unique(kron([1 2],[1 3 9]))
ans =
     1     2     3     6     9    18

How can that idea be used to extend the list of divisors?

If this is homework, then to start, you might want to learn how to factor an integer.

[Mohammad Sohel Rana]

Thank a lot for your help and good suggestions.

Kind regards Sohel