A:
Positive:
1 x 156201055 x 312402123 x 67913537 x 422165115 x 135827185 x 84433851 x 183553671 x 4255
Negative:
-1 x -15620105-5 x -3124021-23 x -679135-37 x -422165-115 x -135827-185 x -84433-851 x -18355-3671 x -4255
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 15,620,105, 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 | 15,620,105 | |
| -1 | -15,620,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,620,105.
Example:
1 x 15,620,105 = 15,620,105
and
-1 x -15,620,105 = 15,620,105
Notice both answers equal 15,620,105
With that explanation out of the way, let's continue. Next, we take the number 15,620,105 and divide it by 2:
15,620,105 ÷ 2 = 7,810,052.5
If the quotient is a whole number, then 2 and 7,810,052.5 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 | 15,620,105 | |
| -1 | -15,620,105 |
Now, we try dividing 15,620,105 by 3:
15,620,105 ÷ 3 = 5,206,701.6667
If the quotient is a whole number, then 3 and 5,206,701.6667 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 | 15,620,105 | |
| -1 | -15,620,105 |
Let's try dividing by 4:
15,620,105 ÷ 4 = 3,905,026.25
If the quotient is a whole number, then 4 and 3,905,026.25 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 | 15,620,105 | |
| -1 | 15,620,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 37 | 115 | 185 | 851 | 3,671 | 4,255 | 18,355 | 84,433 | 135,827 | 422,165 | 679,135 | 3,124,021 | 15,620,105 |
| -1 | -5 | -23 | -37 | -115 | -185 | -851 | -3,671 | -4,255 | -18,355 | -84,433 | -135,827 | -422,165 | -679,135 | -3,124,021 | -15,620,105 |
Here are some more numbers to try:
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