freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-432-totient-sum.md

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---
id: 5900f51e1000cf542c510030
title: 问题432欧拉
challengeType: 5
videoUrl: ''
---
# --description--
令Snm= ∑φn×i且1≤i≤m。 (φ是欧拉的上位函数)
给出S510510,106= 45480596821125120。
找出S510510,1011。 输入答案的最后9位数字。
# --hints--
`euler432()`应该返回754862080。
```js
assert.strictEqual(euler432(), 754862080);
```
# --solutions--