Common Factors

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You are given an array $A$ consisting of $N$ integers. Find the number of positive integers $k$ such that $k$ is a factor of every number in the array. ###Input - First line will contain $T$, number of testcases. Then the testcases follow. - The first line of each test case contains a single integer $N$. - The second line contains $N$ space-separated integers $A_1,A_2,...,A_N$. ###Outpu

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solution.cppC++17

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