There is only one Perfect Number within this range : 496.
If 2ⁿ - 1 is prime then 2ⁿ⁻¹(2ⁿ - 1) is a perfect number.
In this instance n = 5 then, 2⁴(2⁵ - 1) = 16 x 31 = 496...........and 31 is a Prime number.
496.
500
456
102
400 of them.
Any number between 20 and 22.36
496.
500
456
453
400
this mean case numbers between 400 and 500 e.g. at the start of March: The key points you need to know from today is NPHET briefing
How about 450
102
The perfect square of a number is obtained by multiplying the number by itself. For 500, the perfect square is (500 \times 500 = 250,000). Thus, the perfect square of 500 is 250,000.
432, 468
To find a number that, when squared, gives a result between 400 and 500, we can look for the square roots of these boundary numbers. The square root of 400 is 20, and the square root of 500 is approximately 22.36. Therefore, any number between 20 and about 22.36 will satisfy the condition, such as 21 or 21.5.