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Considering just positive integers, there are 6 factorizations of 495 into two factors:
If I recall correctly this was involved in one of Fermat's methods of factoring odd composites.
Have a grrreeeeaaaaaaat day!
You did not say positive numbers or not. There are 24 positive and negative.
Exactly how many are there, I did 24, but it is wrong..
are all solutions of x^2 - y^2 = 495
A number is called a perfect square if it is the square of an integer. How many pairs of perfect squares differ by 495? (Order does not matter. So, the pair "16 and 9" is the same as "9 and 16".)