A:
Positive:
1 x 156761997 x 223945711 x 142510977 x 203587163 x 961731141 x 137391249 x 125511793 x 8743
Negative:
-1 x -15676199-7 x -2239457-11 x -1425109-77 x -203587-163 x -96173-1141 x -13739-1249 x -12551-1793 x -8743
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 15,676,199, 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 | 15,676,199 | |
| -1 | -15,676,199 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,676,199.
Example:
1 x 15,676,199 = 15,676,199
and
-1 x -15,676,199 = 15,676,199
Notice both answers equal 15,676,199
With that explanation out of the way, let's continue. Next, we take the number 15,676,199 and divide it by 2:
15,676,199 ÷ 2 = 7,838,099.5
If the quotient is a whole number, then 2 and 7,838,099.5 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 | 15,676,199 | |
| -1 | -15,676,199 |
Now, we try dividing 15,676,199 by 3:
15,676,199 ÷ 3 = 5,225,399.6667
If the quotient is a whole number, then 3 and 5,225,399.6667 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 | 15,676,199 | |
| -1 | -15,676,199 |
Let's try dividing by 4:
15,676,199 ÷ 4 = 3,919,049.75
If the quotient is a whole number, then 4 and 3,919,049.75 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 | 15,676,199 | |
| -1 | 15,676,199 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 163 | 1,141 | 1,249 | 1,793 | 8,743 | 12,551 | 13,739 | 96,173 | 203,587 | 1,425,109 | 2,239,457 | 15,676,199 |
| -1 | -7 | -11 | -77 | -163 | -1,141 | -1,249 | -1,793 | -8,743 | -12,551 | -13,739 | -96,173 | -203,587 | -1,425,109 | -2,239,457 | -15,676,199 |
Here are some more numbers to try:
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