Question

from which number should 20480 be divided to make its a perfect squares

Answer 1

You can divide it by 5..

2880 = 2x2x2x2x2x2x2x3x3x5 = 2^6x3^2x5

So divide 2880 by 5 to get 576 which is a square of 24.

Hope this helps you mate!