Since 243 = 35, the largest square factor is 34 = 81.
81
9
3
The largest perfect square factor of 48 is 16.
The largest square factor of 557 is 1 because 557 is a prime number
9 is a square number and is a factor of 63
We need to know what number the square is a factor of.
It is: 36 because 6*6 = 36
4
13 is the largest prime factor of 3120.
49
4
36
36
It is: 49