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freeCodeCamp/curriculum/challenges/ukrainian/10-coding-interview-prep/project-euler/problem-342-the-totient-of-a-square-is-a-cube.md

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---
id: 5900f4c31000cf542c50ffd5
title: 'Задача 342: Функція квадрата - куб'
challengeType: 5
forumTopicId: 302001
dashedName: problem-342-the-totient-of-a-square-is-a-cube
---
# --description--
Розглянемо число 50.
${50}^2 = 2500 = 2^2 × 5^4$, отже $φ(2500) = 2 × 4 × 5^3 = 8 × 5^3 = 2^3 × 5^3$. $φ$ позначає функцію Ейлера.
Отже, 2500 - квадрат, а $φ(2500)$ - куб.
Знайдіть суму всіх чисел $n$, $1 < n < {10}^{10}$ при якій $φ(n^2)$ є кубом.
# --hints--
`totientOfSquare()` має повертати `5943040885644`.
```js
assert.strictEqual(totientOfSquare(), 5943040885644);
```
# --seed--
## --seed-contents--
```js
function totientOfSquare() {
return true;
}
totientOfSquare();
```
# --solutions--
```js
// solution required
```