-32
Add them up. The factors of 9 are 1, 3 and 9. The sum of the factors is 13.
The factors of 9 are 1, 3, and 9. 1 + 3 + 9 = 13
The factors of 21 that add up to 8 are 1 and 7.
2 3 5 7 11 13 17 19 23 29 31 and 37 are the prime numbers you can use. Possible options are: 3 + 37 = 40 11 + 29 = 40 2 + 7 + 31 = 40 3 + 7 + 13 + 17 = 40 17 + 23 = 40 3 + 7 + 13 + 17 = 40
The four factors of 33 add up to 48.
The four factors of 33 add up to 48.
-32
They are 1 and 2
-46
-360
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
The only number between 30 and 40 with distinct prime factors which add up to 12 is 35.
Its factors are: 1, 3, 9, 27 and they add up to 40
487
-13
-3 and 16.