A:
Positive:
1 x 187315455 x 37463097 x 267593523 x 81441535 x 535187115 x 162883161 x 116345805 x 23269
Negative:
-1 x -18731545-5 x -3746309-7 x -2675935-23 x -814415-35 x -535187-115 x -162883-161 x -116345-805 x -23269
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 18,731,545, 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 | 18,731,545 | |
| -1 | -18,731,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,731,545.
Example:
1 x 18,731,545 = 18,731,545
and
-1 x -18,731,545 = 18,731,545
Notice both answers equal 18,731,545
With that explanation out of the way, let's continue. Next, we take the number 18,731,545 and divide it by 2:
18,731,545 ÷ 2 = 9,365,772.5
If the quotient is a whole number, then 2 and 9,365,772.5 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 | 18,731,545 | |
| -1 | -18,731,545 |
Now, we try dividing 18,731,545 by 3:
18,731,545 ÷ 3 = 6,243,848.3333
If the quotient is a whole number, then 3 and 6,243,848.3333 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 | 18,731,545 | |
| -1 | -18,731,545 |
Let's try dividing by 4:
18,731,545 ÷ 4 = 4,682,886.25
If the quotient is a whole number, then 4 and 4,682,886.25 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 | 18,731,545 | |
| -1 | 18,731,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 23 | 35 | 115 | 161 | 805 | 23,269 | 116,345 | 162,883 | 535,187 | 814,415 | 2,675,935 | 3,746,309 | 18,731,545 |
| -1 | -5 | -7 | -23 | -35 | -115 | -161 | -805 | -23,269 | -116,345 | -162,883 | -535,187 | -814,415 | -2,675,935 | -3,746,309 | -18,731,545 |
Here are some more numbers to try:
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