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Nov 22, 2011 Old
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Nov 22, 2011 Old
POST HOLDING QUESTIONS THAT PROBABLY WON'T BE UPDATED TOO OFTEN

Find a formula for the sum

Find the smallest natural number greater than 1 billion (10^9) that has exactly 1000 positive divisors. (The term divisor includes 1 and the number itself. So, for example, 9 has three positive divisors.)