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Old 2019-04-07, 16:35   #34
ThiloHarich
 
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Nov 2005

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Sorry.

The sum of all divisors - not only the prime divisors I thought of - can be higher then the number itself. So I misinterpreted your model.

So yes abundant numbers https://en.wikipedia.org/wiki/Abundant_number are good candidates.
But for example 105 and 15 are no such numbers but are good 'k'.

Last fiddled with by ThiloHarich on 2019-04-07 at 17:01
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