片语
perfect square number完全平方数
Find perfect number完美数遍历
the lower perfect neighborhood number图的下完美邻域数
Perfect totient numberIn number theory, a perfect totient number is an integer that is equal to the sum of its iterated totient That is, we apply the totient function to a number n, apply it again to the resulting totient, and so on, until the number 1 is reached, and add together the resulting sequence of numbers; if the sum equals n, then n is a perfect totient number.
lower perfect neighborhood number下完美邻域数
exponentially perfect number指数完全数
perfect cube number完全立方数
perfect t number完全数
an odd perfect number奇完全数