Page 115 - Numbertheory

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1+ 2 + 3 + ... + n = n (n +1)
2

12 . 6n = 12
n (n +1) n +1

2

.1, 2, 3, 4, 6, 12 n +1 .n +1

. 0 . 0,1, 2, 3, 5, 11 n

.5

n3 12! n ()
23 × 3 ( )
24 × 32 ( ) 24 ×3( ) 23 × 32 ( )

: ()

12! = 12×11×10× 9×8× 7× 6× 5× 4×3× 2

= 210 × 35 × 52 × 7 ×11 (23 × 3)3 = 29 × 33
n = 23 × 3
.12!

.

58 n ! n ()

40 ( ) 37 ( ) 35 ( ) 31 ( )

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