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.
456
102
They are: 529 and 576
400 of them.
Any number between 20 and 22.36
496.
453
456
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
They are: 529 and 576
400 of them.
432, 468
400 to 500