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freeCodeCamp/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-379-least-common-multiple-count.md
Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

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Markdown

---
id: 5900f4e81000cf542c50fffa
title: 'Problem 379: Least common multiple count'
challengeType: 5
forumTopicId: 302041
dashedName: problem-379-least-common-multiple-count
---
# --description--
Let f(n) be the number of couples (x,y) with x and y positive integers, x ≤ y and the least common multiple of x and y equal to n.
Let g be the summatory function of f, i.e.: g(n) = ∑ f(i) for 1 ≤ i ≤ n.
You are given that g(106) = 37429395.
Find g(1012).
# --hints--
`euler379()` should return 132314136838185.
```js
assert.strictEqual(euler379(), 132314136838185);
```
# --seed--
## --seed-contents--
```js
function euler379() {
return true;
}
euler379();
```
# --solutions--
```js
// solution required
```