---
id: 5900f50f1000cf542c510021
challengeType: 5
title: 'Problem 418: Factorisation triples'
forumTopicId: 302087
---
## Description
Let n be a positive integer. An integer triple (a, b, c) is called a factorisation triple of n if: 1 ≤ a ≤ b ≤ c
a·b·c = n.
Define f(n) to be a + b + c for the factorisation triple (a, b, c) of n which minimises c / a. One can show that this triple is unique.
For example, f(165) = 19, f(100100) = 142 and f(20!) = 4034872.
Find f(43!).
## Instructions
## Tests
```yml
tests:
- text: euler418() should return 1177163565297340400.
testString: assert.strictEqual(euler418(), 1177163565297340400);
```
## Challenge Seed
```js
function euler418() {
return true;
}
euler418();
```