20:25:28:35

20:25:28:35 is a 7-limit interpretation of the French sixth chord.

Chord information

Harmonics	20:25:28:35
Subharmonics	1/(35:28:25:20)
Intervals from root	1/1–5/4–7/5–7/4
Cents from root	0¢–386¢–583¢–969¢
Step intervals	5/4, 28/25, 5/4
Step cents	386¢, 196¢, 386¢
Prime limit	7
Genus	52⋅7 (175)
Intervallic odd limit	25
Otonal odd limit	35
Utonal odd limit	35
Consistent edos (d ≥ 2)	6edo*, 25edo*, 31edo**, 37edo*, …
* 2 ≤ d < 4; ** 4 ≤ d < 8; *** 8 ≤ d < 16; …

In septimal meantone and marvel temperament, it is tuned identically to 128:160:180:225, and becomes an essentially tempered chord in the 9-odd-limit due to the 28/25 interval being equated with 9/8.