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MetaMathastično! | MataMathnifique #4

Za koliko prirodnih brojeva i takvih da 1 \leq i \leq 1000, postoji prirodan broj j takav da 1 \leq j \leq 1000 te da je i djelitelj od 2^j-1?
For how many natural numbers i such that 1 \leq i \leq 1000, there is a natural number j such that 1 \leq j \leq 1000 and that i is a divisor of 2^j-1?