The strict inequality between dismal divisor counts and their sum

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Let d10(n)d_{10}(n) denote the number of dismal divisors of nn in base 1010, and let σ10(n)\sigma_{10}(n) denote the dismal sum of those divisors. Dismal divisor-sum inequality. For every integer n>1n>1,

d10(n)<σ10(n).d_{10}(n)<\sigma_{10}(n).

The conjecture compares the number of dismal divisors with their dismal sum. It is presented as an unresolved conjecture at the end of the section, with no proof or resolution given.

References

Primary source

David Applegate, Marc LeBrun and N. J. A. Sloane, “Dismal Arithmetic”, arXiv:1107.1130 (2011).

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