document.write( "Question 1030289: My mystery number only has the prime factors of 2,3, and 5. It has 18 factors. What are the possibilities for my mystery number? \n" ); document.write( "
Algebra.Com's Answer #645224 by robertb(5830)\"\" \"About 
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The mystery number would have the form \"2%5Ep%5B1%5D%2A3%5Ep%5B2%5D%2A5%5Ep%5B3%5D\". The number of factors, or divisors, is given by \"%28p%5B1%5D%2B1%29%28p%5B2%5D%2B1%29%28p%5B3%5D%2B1%29\".\r
\n" ); document.write( "\n" ); document.write( "==> \"%28p%5B1%5D%2B1%29%28p%5B2%5D%2B1%29%28p%5B3%5D%2B1%29+=+18\".\r
\n" ); document.write( "\n" ); document.write( "But 18 = 2*3*3, hence there are \"%283%21%29%2F%281%212%21%29+=+3\" possibilities, namely\r
\n" ); document.write( "\n" ); document.write( " \"p%5B1%5D=1\", \"p%5B2%5D=2\", \"p%5B3%5D=2\";
\n" ); document.write( " \"p%5B1%5D=2\", \"p%5B2%5D=1\", \"p%5B3%5D=2\";
\n" ); document.write( " \"p%5B1%5D=2\", \"p%5B2%5D=2\", \"p%5B3%5D=1\";\r
\n" ); document.write( "\n" ); document.write( "==> The possibilities for the mystery number are 450, 300, or 180.
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