Inspired by Problem 1025 and Project Euler 12.
Given n, return the number y of integers that divide N.
For example, with n = 10, the divisors are [1 2 5 10], so y = 4.
It's easy with normal integer but how to proceed with big number?
Test for balanced parentheses
sum of non-primes
Matrix multiplication across rows
Pandigital number n°1 (Inspired by Project Euler 32)
Sum of series V
Negation and new variables
Generalised Hamming Number
Decrypt the cypher using XOR encryption (for beginners)
Find Missing Number
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