amicable numbers (1) 썸네일형 리스트형 [C/C++] Project Euler #21 Amicable Numbers This problem, while not at the level of a Millennium Problem, belongs to the realm of long-standing unsolved mathematical challenges, similar to the proof that no odd perfect number exists. Many people might already be familiar with the concept of a perfect number. A perfect number is defined as a number that equals the sum of its proper divisors (excluding itself). Examples include 6 and 28, wh.. 이전 1 다음