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 Aug 31 comment Recursive number of divisors function @GerryMyerson Yes and it didn't work (I tried 72 = 12*6), but I'm sure there must be a similar property since they are both multiplicative functions (I hope so anyway). Aug 31 comment Recursive number of divisors function Could this be similar to the totient function which also has this property? Can I also say $\sigma(mn) = \sigma(m) * \sigma(n) * \frac{gcd(mn)}{\sigma(gcd(mn))}$? As per here: en.wikipedia.org/wiki/… Aug 31 asked Recursive number of divisors function Aug 30 accepted Finding the maximum remainder of a division Aug 29 comment Finding the maximum remainder of a division @HassanMuhammad Both $x$ and $y$ are positive integers. Aug 29 accepted How to solve $100x +19 =0 \pmod{23}$ Aug 29 asked Finding the maximum remainder of a division Aug 27 accepted Generating integer solutions to $4mn - m^2 + n^2 = ±1$ Aug 27 comment Generating integer solutions to $4mn - m^2 + n^2 = ±1$ Got it! Thank you for your answer Aug 27 comment Generating integer solutions to $4mn - m^2 + n^2 = ±1$ Can you explain the completing the square method in this case? I'm not sure what value I should add and subtract exactly Aug 27 awarded Commentator Aug 27 comment How many integer solutions to a diophantine equation @MichaelBoratko And to what extent can this be verified? If I had not included the first equation in my question, would you have known this is a PE problem? Would this not affect the amount of answers I would be receiving? Aug 27 asked Generating integer solutions to $4mn - m^2 + n^2 = ±1$ Aug 27 awarded Promoter Aug 25 accepted How many numbers less than $x$ are co-prime to $x$ Aug 25 asked How many numbers less than $x$ are co-prime to $x$ Aug 25 comment How to solve $100x +19 =0 \pmod{23}$ How did you get from (-19/100) to (4/100) and from (1/25 ) to (1/2) ??? Aug 25 asked How to solve $100x +19 =0 \pmod{23}$ Aug 21 accepted Finding integer solutions to $m$ and $n$ Aug 19 accepted For what values of $x$ would $nx \equiv 0\pmod{(x-n)}$?