First you should list all the factors of 60:
1,2,3,4,5,6,10,12,15,20,30
Now we can go through each of the factors and see if we can get another factor to add to 17 with it:
For 1 , we would need another factor of 16, which we don't have.
Trying 2, we would need 15, which IS a factor. So 2 and 15 would work.
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2 and 15 5 and 12
66
All of the [positive] whole-number factors of 24 are: 1, 2, 3, 4, 6, 8, 12, and 24. Their sum is 60.
The sum of the first 60 positive integers is 1830.
30 and 60