The second largest prime divisor of an odd perfect number exceeds ten thousand. - Douglas E. Iannucci (Math. Comput., 1999)

The third largest prime divisor of an odd perfect number exceeds one hundred. - Douglas E. Iannucci (Math. Comput., 2000)

Triperfect Numbers: 10800. - Douglas E. Iannucci; Kee-Wai Lau (Am. Math. Mon., 2002)

On the total number of prime factors of an odd perfect number. - Douglas E. Iannucci; Ronald M. Sorli (Math. Comput., 2003)

On the Equation σ(n) = n + φ(n). - Douglas E. Iannucci (J. Integer Seq., 2017)

When the Small Divisors of a Natural Number Are in Arithmetic Progression. - Douglas E. Iannucci (Integers, 2018)

Game values of arithmetic functions. - Douglas E. Iannucci; Urban Larsson (CoRR, 2021)