Problem 432: Totient sum
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.
Test
{{test}}Console output
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.
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