How many positive integers less than 103 have an odd number of positive divisors?

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asked Feb 19, 2018 26.8k views

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Ruthvik · Answer 1 · 2018-02-24T13:20:18+0000

Answer:

The only positive integers that have an odd number of positive divisors are perfect squares, so the only positive integers less than 103 that have an odd number of positive divisors are 1, 4, 9,. . ., 100. There are 10 of these numbers.

Explanation:

How many positive integers less than 103 have an odd number of positive divisors?

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