Not always adorable!
Number Theory
Level
4
A natural number \(m\) is adorable if you can write it as sum of three natural numbers \(m = a+b+c\) such that \( (2 \mid a), (3 \mid b), (4 \mid c) \).
Find the sum of all natural numbers which are not adorable.
Details and assumptions:
\(a\mid b\) means \(a\) divides \(b\), i.e. \(b\) is divisible by \(a\).
As an explicit example, the number \(11\) is adorable because \(11 = 4+3+4\), and \( 2\mid 4 ; 3\mid 3 , 4\mid 4\). But the number \(7\) is not adorable because you can't find such \(a,b,c\).
by
Aditya Raut