Revert "Revert "Add another solution. Divisors""

This reverts commit 999957a4acebd5c757be5a6ee26d1e2c590f58e0.
Revert "Revert "Revert "Add another solution. Divisors"""

This reverts commit 041d19f907fb0768c1111f7b3f47b6d22e7b6669.
add 12