A sous-triple is a 4-multiperfect number 
. 36 sous-triples are known (30240,
32760, 2178540, 23569920, ...; OEIS A027687;
Broughan and Zhou 2010, p. 2), and these are believed to comprise all sous-triples.
Sous-Triple
See also
Multiperfect Number, Sous-DoubleExplore with Wolfram|Alpha
References
Broughan, K. A. and Zhou, Q. "Divisibility by 3 of Even Multiperfect Numbers of Abundancy 3 and 4." J. Integer Seq. 13, Art. 10.1.5, 2010. https://cs.uwaterloo.ca/journals/JIS/VOL13/Broughan/broughan17d.html.Sloane, N. J. A. Sequence A027687 in "The On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
Sous-TripleCite this as:
Weisstein, Eric W. "Sous-Triple." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Sous-Triple.html