freeCodeCamp/curriculum/challenges/portuguese/08-coding-interview-prep/project-euler/problem-439-sum-of-sum-of-d...

1.1 KiB

id challengeType title videoUrl localeTitle
5900f5231000cf542c510035 5 Problem 439: Sum of sum of divisors Problema 439: Soma da soma dos divisores

Description

Seja d (k) a soma de todos os divisores de k. Definimos a função S (N) = ∑1≤i≤N ∑1≤j≤Nd (i · j). Por exemplo, S (3) = d (1) + d (2) + d (3) + d (2) + d (4) + d (6) + d (3) + d (6) + d ( 9) = 59.

Você está dado que S (103) = 563576517282 e S (105) mod 109 = 215766508. Encontre S (1011) mod 109.

Instructions

Tests

tests:
  - text: <code>euler439()</code> deve retornar 968697378.
    testString: 'assert.strictEqual(euler439(), 968697378, "<code>euler439()</code> should return 968697378.");'

Challenge Seed

function euler439() {
  // Good luck!
  return true;
}

euler439();

Solution

// solution required