<section id="description">
The function lcm(a,b) denotes the least common multiple of a and b.
Let A(n) be the average of the values of lcm(n,i) for 1≤i≤n.
E.g: A(2)=(2+2)/2=2 and A(10)=(10+10+30+20+10+30+70+40+90+10)/10=32.Let S(n)=∑A(k) for 1≤k≤n.
S(100)=122726.
Find S(99999999019) mod 999999017.
</section>

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

euler448();


index

Problem 448: Average least common multiple

<code>euler448()</code> should return 106467648.