use of divisors is not allowed.
I think it's because divisors is part of a toolbox, I did not set it up not to allow it.
@cdeliu I have solved another problem in Community and I still am unable to see the best solution. Could you help to give advice on this.
If divisors function is not allowed, you should somehow generate these divisors. The best solution uses the mod function.
I performed speed analyses on this and Solution 1659562 is faster by leaps and bounds if you can see this solution your doing good. I performed this as a hack as I was unable to see the real solutions even after solving others in the community.
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