 The formula_20-adic order formula_155 of an integer formula_1 is the number of copies of formula_20 in the prime factorization of formula_1.The same concept can be extended from integers to rational numbers by defining the formula_20-adic order of a fraction formula_160 to be formula_161.The formula_20-adic absolute value formula_163 of any rational number formula_108 is then defined as
formula_165.