2019 CIME I Problems/Problem 11

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We define a positive integer to be multiplicative<\i> if it can be written as the sum of three distinct positive integers $x, y, z$ such that $y$ is a multiple of $x$ and $z$ is a multiple of $y$. Find the sum of all the positive integers which are not $<i>multiplicative<\i>$.

Solution 1

We don't know yet.

See also

2019 CIME I (ProblemsAnswer KeyResources)
Preceded by
Problem 10
Followed by
Problem 12
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