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Let denote the sum of all positive divisors of n, excluding n itrself.  For example, <4> = 1 + 2 = 3.  What is <<<6>>>?

 Oct 29, 2019

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 #1
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The divisor pairs of 6 are 1 and 6, and 2 and 3. Summing the factors of 6 excluding 6 gets 1+2+3=6, so no matter how many times you apply the function to 6, the answer will always be 6.

 Oct 29, 2019
 #1
avatar+196 
+1
Best Answer

The divisor pairs of 6 are 1 and 6, and 2 and 3. Summing the factors of 6 excluding 6 gets 1+2+3=6, so no matter how many times you apply the function to 6, the answer will always be 6.

power27 Oct 29, 2019

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