Sequence to consider

[Jack Brennen]

Smallest odd number A such that sigma(x)=A has n solutions.

So:  sigma(16)=31 and sigma(25)=31.



Max A. wrote:
> David,
> 
> Something is wrong with the definition.
> For example, why a(3)=4657471 while
> 11 = 1+3+7 = sigma(1) + sigma(2) + sigma(4)
> and 1,2,4 are three distinct numbers?
> 
> Max
> 
> On 9/30/06, David Wilson <davidwwilson at comcast.net> wrote:
>>
>>
>> Smallest odd number that is the sum of divisors of n distinct numbers.
>>
>> Starts
>>
>> 1,31,4657471,20421219,...
>>
>> Presumably there are additional elements.
> 
>