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What is the smallest natural number n such that n! is divisible by 990

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Factors of `990 = 11**3^2**2**5`
Smallest number `n` such that `n!` is divisible by `11` is `11`.
`11!` is also divisible by `9,2 and 5`.
So, `11!` will have all these factors `11,9,5 and 2`.
So, smallest number that is divisible by `990` is `11!`.
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