List questions from multiplicative-function

Published on 16 May 2017 - 5:53

132

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Sum of divisors, a congruence

Published on 17 May 2017 - 15:45

62

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A strange multiplicative function

Published on 26 May 2017 - 9:41

56

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Wrong millimeter values for standard paper sizes at Wikipedia?

Published on 31 May 2017 - 9:20

762

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Euler's Totient Function as a multiplication of terms

Published on 04 Jun 2017 - 19:38

3k

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How do you get the multiplicative inverse by reading a multiplication table of modulo $n$?

Published on 02 Jul 2017 - 18:13

608

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Find all $n$ such $\sigma(n) = 546$

Published on 06 Jul 2017 - 14:11

125

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How to reformulate a multiplicative formula (with two primes, perhaps like totient-function)?

Published on 25 Jul 2017 - 7:08

54

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Always true : $ ( \sum_{i=1}^d x_i^a )( \sum_{i=1}^d y_i^a ) = ( \sum_{i=1}^d z_i^a )$

Published on 15 Aug 2017 - 16:03

641

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When is the product of two Dirichlet $L$-functions also a Dirichlet $L$-function?

Published on 30 Aug 2017 - 20:12

75

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Interesting multiplicative Ramanujan-like q-expansions

Published on 24 Mar 2026 - 5:18

131

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Show that $\sigma(n)$ is equally often even and odd

Published on 21 Sep 2017 - 21:56

185

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find strictly increasing function $f:\mathbb{N}\rightarrow \mathbb{R}$ such that $f(2)=2$ and $f(x\cdot y)=f(x)\cdot f(y)$ when $\gcd(x,y)=1$

Published on 05 Oct 2017 - 9:15

202

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On arithmetic functions whose Dirichlet series has a special kind of abscissa of absolute convergence

Published on 07 Oct 2017 - 10:34

73

Views

Does the Euler product stand for $a(n)=rad(n)$?

Published on 13 Oct 2017 - 9:50

List Question

Multiplicative Functions and Totient Function

Sum of divisors, a congruence

A strange multiplicative function

Wrong millimeter values for standard paper sizes at Wikipedia?

Euler's Totient Function as a multiplication of terms

How do you get the multiplicative inverse by reading a multiplication table of modulo $n$?

Find all $n$ such $\sigma(n) = 546$

How to reformulate a multiplicative formula (with two primes, perhaps like totient-function)?

Always true : $ ( \sum_{i=1}^d x_i^a )( \sum_{i=1}^d y_i^a ) = ( \sum_{i=1}^d z_i^a )$

When is the product of two Dirichlet $L$-functions also a Dirichlet $L$-function?

Interesting multiplicative Ramanujan-like q-expansions

Show that $\sigma(n)$ is equally often even and odd

find strictly increasing function $f:\mathbb{N}\rightarrow \mathbb{R}$ such that $f(2)=2$ and $f(x\cdot y)=f(x)\cdot f(y)$ when $\gcd(x,y)=1$

On arithmetic functions whose Dirichlet series has a special kind of abscissa of absolute convergence

Does the Euler product stand for $a(n)=rad(n)$?

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