, , .
, . , 2 2 3 5 3 2 5 2. , .
. , , .
, .
:
1) ,
2) .
. : ?
, : = , .. .
1) .
> 1 - . 1, = 1 1, 1 = 1 1 > 1. 1 = 1, = 1 . 1 > 1, 2, .. n 1 = p 2 × n 2, n = p 1 p 2 n 2. 2 = 1 2 > 1. 2 = 1, n 1 = 2 n=p 1 × p 2 . 2 > 1, 2 3, 2 = p3 × n3, = p 1 × p 2 × p 3 × n 3, 3 = 1, n = p 1 p 2 p 3 . 3 > 1, .
, n 1, n 2, n 3, : n 1 > n 2 > n 3 > . , n, . , , - n = 1. n = p 1 p 2 p, p 1, p 2, , p .
1 .
, ,
168 | 2 | |
84 | 2 | |
42 | 2 | |
21 | 3 | |
7 | 7 | |
1 |
, , n 2, 3, 5, 7.
2) ( ).
, n > 1 : n = p 1 p 2 p n = q 1 q 2 qm, pi qi, , , ≠ m.
|
|
p 1 p 2 p = q 1 q 2 qm (*). q 1, q 1, 5 ( 9) q 1. , , p 1 q 1, p 1 q 1 , 6 ( 3) p 1 = q 1. (*) 1, :
p 2 p 3 p = q 2 q 3 qm.
, q 2, q 3, , qm 2. q 2 = 2, p 3 p 4 p = q 3 q 4 qm. , :
1) = , (*) (*) n, , ;
2) < 1 = qk +1 qk +2 qm, .. ;
3) > pm +1 pm +2 pk = 1.
, > 1 .
p 1, p 2, , p , , , : , , p 1, p 2, , p .
> 1 n . , 360 = 23 32 5.