A:
Positive:
1 x 1210210455 x 2420420917 x 711888585 x 1423777139 x 870655695 x 1741312363 x 5121510243 x 11815
Negative:
-1 x -121021045-5 x -24204209-17 x -7118885-85 x -1423777-139 x -870655-695 x -174131-2363 x -51215-10243 x -11815
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 121,021,045, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 121,021,045 | |
| -1 | -121,021,045 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,021,045.
Example:
1 x 121,021,045 = 121,021,045
and
-1 x -121,021,045 = 121,021,045
Notice both answers equal 121,021,045
With that explanation out of the way, let's continue. Next, we take the number 121,021,045 and divide it by 2:
121,021,045 ÷ 2 = 60,510,522.5
If the quotient is a whole number, then 2 and 60,510,522.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 121,021,045 | |
| -1 | -121,021,045 |
Now, we try dividing 121,021,045 by 3:
121,021,045 ÷ 3 = 40,340,348.3333
If the quotient is a whole number, then 3 and 40,340,348.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 121,021,045 | |
| -1 | -121,021,045 |
Let's try dividing by 4:
121,021,045 ÷ 4 = 30,255,261.25
If the quotient is a whole number, then 4 and 30,255,261.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 121,021,045 | |
| -1 | 121,021,045 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 139 | 695 | 2,363 | 10,243 | 11,815 | 51,215 | 174,131 | 870,655 | 1,423,777 | 7,118,885 | 24,204,209 | 121,021,045 |
| -1 | -5 | -17 | -85 | -139 | -695 | -2,363 | -10,243 | -11,815 | -51,215 | -174,131 | -870,655 | -1,423,777 | -7,118,885 | -24,204,209 | -121,021,045 |
Here are some more numbers to try:
Try the factor calculator