SOLUTION: hi there..how can solve the sequence of abundant numbers?can you give me a formula to list it easily.thank you..
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Question 841526: hi there..how can solve the sequence of abundant numbers?can you give me a formula to list it easily.thank you..
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
I don't believe there is a fast way to determine whether an integer is abundant or not. Given 
we have
 = (1+p_1 + \ldots + p_1^{e_1})(1 + p_2 + \ldots + p_2^{e_2}) \ldots (1+p_k+\ldots + p_k^{e_k}))
and 
is abundant if  > 2n)
. Note that if is abundant, then 
is also abundant where 
.
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