To find the factors of a number, you have to find all the pairs of number that multiply together to give that number.

The factors of 48 are:

1 and 48
2 and 24
3 and 16
4 and 12
6 and 8

If we leave out the number we started with, 48, and add all the other factors we get 76. 1 + 2 + 3 + 4 + 6 + 8 + 12 + 16 + 24 = 76

So .... 48 is called an abundant number because it is less than the sum of its factors (without itself). (48 is less than 76)

Now... find some more abundant numbers!