Python 基础知识简单

数量丰富

“数量丰富”问题的详细指南和 Python 实现。

问题陈述

简单

编写一个函数 is_abundant(n) ,它接受正整数 n ,如果 n 是一个丰富的数字,则返回 True ,否则返回 False 。充裕数是指其真因数(除该数本身之外的所有因数)之和大于该数的数。

约束条件
  • 1 <= n <= 10^6

示例

Example 1
Input
n = 12
Output
True
Explanation

Proper divisors of 12: 1, 2, 3, 4, 6. Sum = 16. Since 16 > 12, it is abundant.

Example 2
Input
n = 18
Output
True
Explanation

Proper divisors of 18: 1, 2, 3, 6, 9. Sum = 21. Since 21 > 18, it is abundant.

Example 3
Input
n = 7
Output
False
Explanation

Proper divisors of 7: 1. Sum = 1. Since 1 < 7, it is not abundant.

Need a Hint?
考虑使用特定于基础的数据结构,例如集合或堆。
Edge Cases to Watch
  • 空输入结构
  • 单元素输入
  • 大数值范围

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