A:
Positive:
1 x 12053532117 x 709031343 x 2803147181 x 665941731 x 164891911 x 1323113077 x 391737783 x 15487
Negative:
-1 x -120535321-17 x -7090313-43 x -2803147-181 x -665941-731 x -164891-911 x -132311-3077 x -39173-7783 x -15487
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 120,535,321, 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 | 120,535,321 | |
| -1 | -120,535,321 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,535,321.
Example:
1 x 120,535,321 = 120,535,321
and
-1 x -120,535,321 = 120,535,321
Notice both answers equal 120,535,321
With that explanation out of the way, let's continue. Next, we take the number 120,535,321 and divide it by 2:
120,535,321 ÷ 2 = 60,267,660.5
If the quotient is a whole number, then 2 and 60,267,660.5 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 | 120,535,321 | |
| -1 | -120,535,321 |
Now, we try dividing 120,535,321 by 3:
120,535,321 ÷ 3 = 40,178,440.3333
If the quotient is a whole number, then 3 and 40,178,440.3333 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 | 120,535,321 | |
| -1 | -120,535,321 |
Let's try dividing by 4:
120,535,321 ÷ 4 = 30,133,830.25
If the quotient is a whole number, then 4 and 30,133,830.25 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 | 120,535,321 | |
| -1 | 120,535,321 |
If you did it right, you will end up with this table:
| 1 | 17 | 43 | 181 | 731 | 911 | 3,077 | 7,783 | 15,487 | 39,173 | 132,311 | 164,891 | 665,941 | 2,803,147 | 7,090,313 | 120,535,321 |
| -1 | -17 | -43 | -181 | -731 | -911 | -3,077 | -7,783 | -15,487 | -39,173 | -132,311 | -164,891 | -665,941 | -2,803,147 | -7,090,313 | -120,535,321 |
Here are some more numbers to try:
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