A problem of Ramanujan, Erdos and Katai on the iterated divisor function

Details A problem of Ramanujan, Erdos and Katai on the iterated divisor function A problem of Ramanujan, Erdos and Katai on the iterated divisor function

2011-08-08

arxiv.org/abs/1108.1815v1

Mathematics

Number Theory

8 pages

Scientific paper

We determine asymptotically the maximal order of log d(d(n)), where d(n) is
the number of positive divisors of n. This solves a problem first put forth by
Ramanujan in 1915.

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