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These occur since 1 = 10/10, 2 = 10/5, and 5 = 10/2. Note that 10 is not an aliquot part of 10 since it is not a proper quotient, i.e. a quotient different from the number itself. A perfect number is defined to be one which is equal to the sum of its aliquot parts.
Quick Answer. The definition of a perfect cube is a number that is the result of multiplying an integer by itself three times. In other words, according to Reference.com, it is an integer to the third power. An integer is any positive or negative whole number and zero.