The factors of 122 are 1, 2, 61, 122. The way to calculate the factors of 122 is as follows. Take 122 and the number 1. Those are the first two factors.
Try 1. 1 x 122 = 122, so put these into our factor list.
1
...
122
Take 2. 2 x 61 = 122, which means we add these to our factor list.
1
2
...
61
122
Now take 3... no. 122/3 isn't a whole number. So we skip 3.
Next try 4... no luck. 122/4 isn't a whole number. So we skip 4.
Now try 5... nope! 122/5 isn't a whole number. So we skip 5.
Try 6... no good. 122/6 isn't a whole number. So we skip 6.
Take 7... no. 122/7 isn't a whole number. So we skip 7.
Now take 8... no luck. 122/8 isn't a whole number. So we skip 8.
Next try 9... nope! 122/9 isn't a whole number. So we skip 9.
Now try 10... no good. 122/10 isn't a whole number. So we skip 10.
Try 11... no. 122/11 isn't a whole number. So we skip 11.
Now, since we don't have any more numbers to try, we're done!