MathDB
1997 AJHSME #11 - Mean of Divisors

Source:

June 30, 2011
AMC

Problem Statement

Let N\boxed{N} mean the number of whole number divisors of NN. For example, 3=2\boxed{3}=2 because 3 has two divisors, 1 and 3. Find the value of
11×20.\boxed{\boxed{11}\times\boxed{20}}.
<spanclass=′latex−bold′>(A)</span> 6<spanclass=′latex−bold′>(B)</span> 8<spanclass=′latex−bold′>(C)</span> 12<spanclass=′latex−bold′>(D)</span> 16<spanclass=′latex−bold′>(E)</span> 24<span class='latex-bold'>(A)</span>\ 6 \qquad <span class='latex-bold'>(B)</span>\ 8 \qquad <span class='latex-bold'>(C)</span>\ 12 \qquad <span class='latex-bold'>(D)</span>\ 16 \qquad <span class='latex-bold'>(E)</span>\ 24
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