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 Sep6 suggested approved edit on How to find the values of $a$ and $b$, given $c$ Sep6 accepted Recursive number of divisors function Sep6 asked Fibonacci nth term Sep3 accepted Integer solutions of $p^2 + xp - 6y = \pm1$ Sep3 comment Finding integer coordinates on a sphere's surface @GerryMyerson No this subject was discussed in my number theory class. I would also kindly request you stop accusing me of posting PE problems on every question I post. Sep3 comment Integer solutions of $p^2 + xp - 6y = \pm1$ Thank you for your answer. Can you explain this part please: "Any positive number congruent to −2 modulo 6"? Sep3 comment Finding integer coordinates on a sphere's surface @GerryMyerson Yet that question has no answer either. Sep2 comment Finding integer coordinates on a sphere's surface @Lubin Not necessarily, but it depends on what values of $r$ can generate solutions. Sep2 comment Finding integer coordinates on a sphere's surface @BillCook That gives points inside a circle, I require points on a surface. Sep2 asked Integer solutions of $p^2 + xp - 6y = \pm1$ Sep2 asked Finding integer coordinates on a sphere's surface Aug31 comment Recursive number of divisors function And this will not work for the number-of-divisors function? Aug31 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). Aug31 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/… Aug31 asked Recursive number of divisors function Aug30 accepted Finding the maximum remainder of a division Aug29 comment Finding the maximum remainder of a division @HassanMuhammad Both $x$ and $y$ are positive integers. Aug29 accepted How to solve $100x +19 =0 \pmod{23}$ Aug29 asked Finding the maximum remainder of a division Aug27 accepted Generating integer solutions to $4mn - m^2 + n^2 = ±1$