Proposition: Sum of Euler Function

The sum over divisors of the Euler function equals $$\sum_{d\mid n}\phi(d)=n.$$

Proofs: 1

Proofs: 1


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References

Bibliography

  1. Landau, Edmund: "Vorlesungen ├╝ber Zahlentheorie, Aus der Elementaren Zahlentheorie", S. Hirzel, Leipzig, 1927