Elementary Number Theory: Finding All Divisors by "Hand" (sort of)
It is possible to find all the positive divisors of a small natural number "n" using only pen, paper, and a simple calculator. This video gives a method to do just that. Some interesting graphics about the divisors of a number are given.
Checking for Divisibility by 2 and 3: • Elementary Number Theory: Checking for Div...
Checking for Divisibility by 4,5,6,7, and 8: • Elementary Number Theory: Divisibility for...