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.
The only cubic number between 400 and 600 is 8 x 8 x 8 (83) = 512.
300
400 can be factored as 24 * 52, or 22 * 22 * 52. A perfect square factor of 400 will always have an even exponent, so here is a list: 12, 22, 42, 52, 102, and 202.
440
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.
The only cubic number between 400 and 600 is 8 x 8 x 8 (83) = 512.
the highest one is 20x20 =400 all you have to do is find the answers to from 1x1 to 19x19 that is only 19 little calculations good luck
300
A prime number is divisible only by 1 or itself.
There is only one number that equals 400. The number is 400, and it's not a prime number.
400 can be factored as 24 * 52, or 22 * 22 * 52. A perfect square factor of 400 will always have an even exponent, so here is a list: 12, 22, 42, 52, 102, and 202.
Any number between 20 and 22.36
440
400
700
This number would have to be a squared number as it only has 15 factors. The number I have calculated is 324 as the square root is 18