Posted by Anonymous...urgent! on Monday, March 4, 2013 at 1:24am.
A number, greater than or equal to 2, is called productperfect if it is equal to the product of all of its proper divisors. For example, 6=1×2×3, hence 6 is product perfect. How many productperfect numbers are there below 50?

algebra  kishan, Monday, March 4, 2013 at 7:55am
answer is 15
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