perfect t number完全数
perfect cube number完全立方数
perfect square number完全平方数
lower perfect neighborhood number下完美邻域数
Perfect totient number完全欧拉数
the lower perfect neighborhood number图的下完美邻域数
Find perfect number完美数遍历
an odd perfect number奇完全数
exponentially perfect number指数完全数
N(名词) an integer, such as 28, that is equal to the sum of all its possible factors, excluding itself 完全数