Question

For how many odd positive integers n<1000 does the number of positive divisors of n divide n?

Answer 1

1000/6

Answer 2

and integer just smaller than that

Answer 3

oh. so the number of non-primes < 1000

Answer 4

http://en.wikipedia.org/wiki/Perfect_number

Answer 5

125 has two divisors. 5 and 25. 2 does not divide 125 so 125 is not a candidate.

Answer 6

I was close by chance :P
the answer I think is 167

Answer 7

@Hoa It says the number of divisors must divide the number. So if the number is odd, the number of divisors could not be even.

Answer 8

:P

Answer 9

the answer is not 13