Valid Max Number of "Max Covenant" ?

[Arkblade]

i have a question. Valid Max Number of "Max Covenant" ?
itself can use 100+ numbers. (if clans don't allow duplication, it max can be 20)
however, i guess some UI elements does not correspond those number.

ie: Graph of circular in relation screen. world map's covenant names(upper left list)
(also power rankings seem to show top 15. however it not need to be show all clans)

so i want to know Valid Max Number of "Max Covenant".
In other words, i want to know Valid Max Number of Graph of circular in relation screen.

If possible, whether it is the same in drox operative.