Could someone please help me solve this problem?

Question

sepeario · Answer

attachment

directrix · Answer

@Sepeario

For the composite number between 70 and 80, I think 74 may work.

74 = 2*37; 2 + 37 = 39 --->

39 = 3*13; 3 + 13 = 16 ---->

16 = 2*2*2*2; 2+2+2+2 = 8--->

8 = 2*2*2; 2+2+2 = 6 --->

6 = 2*3; 2 + 3 = 5 ------->

The factor sums of 39, 16, 8, 6, and 5 sum to 74 which is the original number.

directrix · Answer

I leave the other two for you to find. 

Hint: Look for one of the two to be greater than 36 but less than 40.

The other just might be greater than 19 but less than 23. 

@Sepeario

sepeario · Answer

@Directrix thanks so much! I'll work on doing that now.

directrix · Answer

@Sepeario   Great! Let me know what you get for those two numbers. Cool problem, I think.