CF616E Sum of Remainders

Calculate the value of the sum: $ n $ mod $ 1 $ + $ n $ mod $ 2 $ + $ n $ mod $ 3 $ + ... + $ n $ mod $ m $ . As the result can be very large, you should print the value modulo $ 10^{9}+7 $ (the remainder when divided by $ 10^{9}+7 $ ). The modulo operator $ a $ mod $ b $ stands for the remainder after dividing $ a $ by $ b $ . For example $ 10 $ mod $ 3 $ = $ 1 $ .

N/A

N/A