How the sequence works: Say for example, you start with 20, you need to subtract all the factors, starting from 1. 1-2-4-5-10= -20 so 20 follows the sequence. Now let's try 148 (THE BEST OF ALL). 1-2-4-37-74= -116. So 148 unfortunately does ṄÖŤ folllow this sequence.
2 we're figured out by me, and the other 8 from gemini because I almost gave up on this. Credit to my sister @rainbow271 for making a sound for 650 and made the character that I made with the asset.