# Euler φ函數

[目錄呈現與來源綁定資料](https://ocme.evemisslab.com/data/i18n/catalogue.en.json)



## [Euler φ函數](https://ocme.evemisslab.com/zh-Hant/atlas/atlas-euler-totient-function/)

Euler φ(n)計數一個完整剩餘代表系中與n互質的代表；約定φ(1)=1。

atlas-euler-totient-function · canonical_mko

[Euler φ函數](https://ocme.evemisslab.com/zh-Hant/mko/mko-euler-totient-function/)

## 前置節點


- [自然數質數](https://ocme.evemisslab.com/zh-Hant/atlas/atlas-prime-number/)
- [最大公因數與互質](https://ocme.evemisslab.com/zh-Hant/atlas/atlas-gcd-coprime/)
- [基本計數原理](https://ocme.evemisslab.com/zh-Hant/atlas/atlas-counting-principle/)
- [函數映射](https://ocme.evemisslab.com/zh-Hant/atlas/atlas-function-mapping/)