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推廣網站開發,包含 Laravel 和 Kotlin 後端撰寫、自動化測試、讀書心得等。Taiwan Kotlin User Group 管理員。

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Hi, here's your problem today. This problem was recently asked by Facebook:

A Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself.

For instance, 28 = 1 + 2 + 4 + 7 + 14

Write a function to determine if a number is a perfect number.

class Solution(object): def checkPerfectNumber(self, num): # Fill this in.

print(Solution().checkPerfectNumber(28))

True

28 = 1 + 2 + 4 + 7 + 14