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Topic: Number Theory - value of the sum
Replies: 1   Last Post: Nov 19, 2007 8:37 AM

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Posts: 2
From: Warsaw, Poland
Registered: 11/19/07
Number Theory - value of the sum
Posted: Nov 19, 2007 8:03 AM
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Hi all,
Let u range over integers with \omega(u)=2 (that means
it has only two distinct prime dividers) and the grater prime divider is not bigger then y.
What is the value of sum of 1/u?
It should be more or less equal to
(loglog y)^2 but I don't know why...
If it helps: Sum of p-prime <= x is more or less log log x ;)
I would appreciate of kinds of help.

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