Number Theory

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Hari loves to play with numbers. He finds that the numbers 4 and 7 are lucky for him. So he also considers positive integer numbers whose decimal representation contains only the lucky digits 4 and 7 as lucky. For example, numbers 47, 744, 4 are lucky for him and 5, 17, 467 are not. Hari calls a number almost lucky if it could be evenly divided by some lucky number. Help him find out if the give

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solution.cppC++17

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