Page 103 - Numbertheory

@ @@@lb¨a@À@óïŽbŽÿa@óåè ¾a

4k = 0 .3 1
k =0

.4

[Positive Divisors]

12
12 = 22 ×3

.b = 0, 1 a = 0,1, 2 12
2a × 3b

22 × 30 = 4 21 × 31 = 6 21 × 30 = 2 20 × 31 = 3 20 × 30 = 1

.6 . 22 ×31 = 12

n = p pk1 k 2 ... p kt
12 t

ki pi

(k 1 +1) (k 2 +1) ... (k t +1) ()

.420

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