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Density bounds for the sum of divisors function. (English) Zbl 0258.10025

MSC:
11N60 Distribution functions associated with additive and positive multiplicative functions
11B83 Special sequences and polynomials
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References:
[1] F. Behrend, “Über ’numeri abundantes.’ II,” Preuss. Akad. Wiss. Sitzungsber., v. 6, 1933, pp. 280-293. · Zbl 0006.39601
[2] H. Davenport, “Über ’numeri abundantes,’ “ Preuss. Akad. Wiss. Sitzungsber., v. 26/29, 1933, pp. 830-837. · JFM 59.0948.04
[3] C. Wall, Topics Related to the Sum of Unitary Divisors of an Integer, Ph.D. Dissertation, University of Tennessee, Knoxville, Tenn., 1970.
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