1 and 2.
The answer to what is the sum of the first positive even numbers is 930. It doesn't mean that you add all the even numbers up until you reach the number 30. In fact, since you have to get the sum of the even numbers, you have to add all even numbers until you get to the number 60.
2 + 3 + 5 = 10
the factors of 60 are 1,2,3,4,5,6,10,12,15,20,30,60
54 Factors of 54 are 2,3,3,3 (54=2x33). Sum of the factors is 11=2+3+3+3.
2, 4, 6, 10, 12, 20, 30, 60 add up to 144.
28
The even factors of 60 are: 2, 4, 6, 10, 12, 20, 30, 60.
60
60
1 + 3 + 5 + 15 = 24
2, 4, 6, 10, 12, 20, 30, 60 add up to 144.
All of the [positive] whole-number factors of 24 are: 1, 2, 3, 4, 6, 8, 12, and 24. Their sum is 60.
Every one of them has an even number of factors.
36 and 24
1 and 2.
All of them.