577 B
577 B
id | title | challengeType | forumTopicId |
---|---|---|---|
5900f51e1000cf542c510030 | Problem 432: Totient sum | 5 | 302103 |
--description--
Let S(n,m) = ∑φ(n × i) for 1 ≤ i ≤ m. (φ is Euler's totient function)
You are given that S(510510,106 )= 45480596821125120.
Find S(510510,1011). Give the last 9 digits of your answer.
--hints--
euler432()
should return 754862080.
assert.strictEqual(euler432(), 754862080);
--seed--
--seed-contents--
function euler432() {
return true;
}
euler432();
--solutions--
// solution required