Erdős Problem #449 — Few nearby divisor pairs for almost every integer

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Let r(n)r(n) count divisor pairs d1<d2<2d1d_1<d_2<2d_1 of nn. Is it true that for every ϵ>0\epsilon>0, r(n)<ϵτ(n)r(n)<\epsilon\tau(n) for almost every nn?

References

Additional references

P. Erdős and R. L. Graham, Old and new problems and results in combinatorial number theory, Monographies de L'Enseignement Mathématique 28 (1980).

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