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January 7th, 2012, 01:36 AM  #1 
Newbie Joined: Jan 2012 Posts: 1 Thanks: 0  Prime factorization and Stirling number
Hi, I am new to this forum. My question: In how many ways can the number 10395 be factored in two or more factors, each greater than 1, with no regard to the order of factors? (10395 = 3 * 5 * 7 * 9 * 11) It would have been easy if each number been a different prime number; that is just the Stirling number, but what to do now? Cheers 
January 13th, 2012, 05:49 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,919 Thanks: 2203 
Try reading about Bell numbers.


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