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?
Find common elements in matrix rows
Doubling elements in a vector
Make roundn function
Add more zeros
BLOCK x3 (Version 3)
I want to know everything!
Longest Collatz Sequence
How to reverse spdiags ?
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