Thank you !

So I don't have to look with which sequence there is a merging for sequence 13^12.

I know how to do if there is a merging with a sequence that starts on a number less than 3*10^6, thanks to the explanations of kar_bon and thanks to this page :

https://www.rechenkraft.net/aliquot/AllSeq.txt
But to find the mergers with the other FactorDB sequences already calculated, which start with numbers greater than 3*10^6, I don't know how to do it !