LCM of Numbers

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Petya has number Y. He is sorting through the numbers X from 1 to 10^18, and for every X writes [X,Y]÷X on blackboard. Here [X,Y] stands for least common multiple of X and Y. Petya is very lazy, that's why this task bored him soon. But he is interested in how many different numbers he would write on the board if he would finish the task. Help him to find the quantity of different numbers he would

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solution.cppC++17

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