20:25:28:35

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; …

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

In marvel temperament, it is tuned identically to 128:160:180:225; in starling, it is tuned identically to 72:90:100:125; and in septimal meantone it is tuned the same as both of those. In all of those temperaments, it becomes an essentially tempered chord in the 9-odd-limit due to the ~28/25 interval being equated with either 9/8 or 10/9.