freeCodeCamp

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id	challengeType	title	videoUrl	localeTitle
5900f52c1000cf542c51003f	5	Problem 448: Average least common multiple		Problema 448: Múltiplo menos comum comum

Description

A função lcm (a, b) indica o menor múltiplo comum de a e b. Seja A (n) a média dos valores de lcm (n, i) para 1≤i≤n. Por exemplo: A (2) = (2 + 2) / 2 = 2 e A (10) = (10 + 10 + 30 + 20 + 10 + 30 + 70 + 40 + 90 + 10) / 10 = 32.

Seja S (n) = ∑A (k) para 1≤k≤n. S (100) = 122726.

Encontre S (99999999019) mod 999999017.

Instructions

Tests

tests:
  - text: ''
    testString: 'assert.strictEqual(euler448(), 106467648, "<code>euler448()</code> should return 106467648.");'

Challenge Seed

function euler448() {
  // Good luck!
  return true;
}

euler448();

Solution

// solution required

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