A:
Positive:
1 x 1204054555 x 24081091103 x 1168985113 x 1065535515 x 233797565 x 2131072069 x 5819510345 x 11639
Negative:
-1 x -120405455-5 x -24081091-103 x -1168985-113 x -1065535-515 x -233797-565 x -213107-2069 x -58195-10345 x -11639
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 120,405,455, 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 | 120,405,455 | |
| -1 | -120,405,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,405,455.
Example:
1 x 120,405,455 = 120,405,455
and
-1 x -120,405,455 = 120,405,455
Notice both answers equal 120,405,455
With that explanation out of the way, let's continue. Next, we take the number 120,405,455 and divide it by 2:
120,405,455 ÷ 2 = 60,202,727.5
If the quotient is a whole number, then 2 and 60,202,727.5 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 | 120,405,455 | |
| -1 | -120,405,455 |
Now, we try dividing 120,405,455 by 3:
120,405,455 ÷ 3 = 40,135,151.6667
If the quotient is a whole number, then 3 and 40,135,151.6667 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 | 120,405,455 | |
| -1 | -120,405,455 |
Let's try dividing by 4:
120,405,455 ÷ 4 = 30,101,363.75
If the quotient is a whole number, then 4 and 30,101,363.75 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 | 120,405,455 | |
| -1 | 120,405,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 103 | 113 | 515 | 565 | 2,069 | 10,345 | 11,639 | 58,195 | 213,107 | 233,797 | 1,065,535 | 1,168,985 | 24,081,091 | 120,405,455 |
| -1 | -5 | -103 | -113 | -515 | -565 | -2,069 | -10,345 | -11,639 | -58,195 | -213,107 | -233,797 | -1,065,535 | -1,168,985 | -24,081,091 | -120,405,455 |
Here are some more numbers to try:
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