Introduction to Number Theory Learn the fundamentals of number theory from former MATHCOUNTS, AHSME, and AIME perfect scorer Mathew Crawford. Topics covered in the book include primes & composites, multiples & divisors, prime factorization and its uses, base numbers, modular arithmetic, divisibility rules, linear congruences, how to develop number sense, and much more.
Elementary Number Theory (5th Edition)
Number Theory, GCF and LCM, Divisibility Rules, Prime Factorization Worksheets
This math unit on number theory has it all: Definitions Divisibility Rules Prime or Composite Factors Prime Factorization Greatest Common Factor (2 methods!) Least Common Multiple Practice and Enrichment Sheets
A Course in Number Theory and Cryptography (Graduate Texts in Mathematics)
An Introduction to Number Theory (MIT Press)
Elementary Number Theory: Second Edition (Dover Books on Mathematics)