Mock AIME 1 2005-2006/Problem 7: Difference between revisions
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== Problem == | == Problem == | ||
Revision as of 05:50, 28 August 2013
Problem
Let
denote the number of divisors of a positive integer
. Evaluate
.
Solution
=
, so
has
positive divisors.
=
so
has
, or
divisors.