
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Alexander has chosen a natural number  $N>1$  and has written down in a line,and in increasing order,all his positive divisors  $d_1<d_2<\ldots <d_s$  (where  $d_1=1$  and  $d_s=N$ ).For each pair of neighbouring numbers,he has found their greater common divisor.The sum of all these  $s-1$  numbers (the greatest common divisors) is equal to  $N-2$ .Find all possible values of  $N$ .

Present the answer in LaTex format: \boxed{Your answer}
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