# Introduction to Number Theory

@inproceedings{Meyer2005IntroductionTN, title={Introduction to Number Theory}, author={A. Meyer and R. Rubinfeld}, year={2005} }

This seems simple enough, but let’s play with this definition. The Pythagoreans, an ancient sect of mathematical mystics, said that a number is perfect if it equals the sum of its positive integral divisors, excluding itself. For example, 6 = 1 + 2 + 3 and 28 = 1 + 2 + 4 + 7 + 14 are perfect numbers. On the other hand, 10 is not perfect because 1 + 2 + 5 = 8, and 12 is not perfect because 1+2+3+4+6 = 16. Euclid characterized all the even perfect numbers around 300 BC. But is there an odd… Expand