496
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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.
300
To find a cube number between 400 and 600, we need to calculate the cube root of the two limits. The cube root of 400 is approximately 7.37, and the cube root of 600 is approximately 8.66. Therefore, the cube numbers between 400 and 600 are the cubes of integers between 8 and 7, inclusive. The cube of 8 is 512, which falls within the range specified.
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.
To find a cube number between 400 and 600, we need to calculate the cube root of the two limits. The cube root of 400 is approximately 7.37, and the cube root of 600 is approximately 8.66. Therefore, the cube numbers between 400 and 600 are the cubes of integers between 8 and 7, inclusive. The cube of 8 is 512, which falls within the range specified.
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.
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
Any number between 20 and 22.36
440
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