what do you mean dividing by a factor of 10? just like taking a tenth of the solution out and placing it in a beaker? In that case it won't affect the concentraition unless the beaker it's poured into is full of a solvent so you would've only just halved the concentration so the level of dilution shouldn't be affect by the dividing by 10. So the conentration is 1/2 of what it orignally was.
If you meant reduce the level of concentration by a factor of 10 then the overall dilution is such that the concentration has been reduced to be 1/20 of what it originally was.