A:
Positive:
1 x 1885516113 x 145039731 x 60823159 x 31957961 x 309101169 x 111569403 x 46787767 x 24583793 x 237771829 x 103091891 x 99713599 x 5239
Negative:
-1 x -18855161-13 x -1450397-31 x -608231-59 x -319579-61 x -309101-169 x -111569-403 x -46787-767 x -24583-793 x -23777-1829 x -10309-1891 x -9971-3599 x -5239
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 18,855,161, 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 | 18,855,161 | |
| -1 | -18,855,161 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,855,161.
Example:
1 x 18,855,161 = 18,855,161
and
-1 x -18,855,161 = 18,855,161
Notice both answers equal 18,855,161
With that explanation out of the way, let's continue. Next, we take the number 18,855,161 and divide it by 2:
18,855,161 ÷ 2 = 9,427,580.5
If the quotient is a whole number, then 2 and 9,427,580.5 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 | 18,855,161 | |
| -1 | -18,855,161 |
Now, we try dividing 18,855,161 by 3:
18,855,161 ÷ 3 = 6,285,053.6667
If the quotient is a whole number, then 3 and 6,285,053.6667 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 | 18,855,161 | |
| -1 | -18,855,161 |
Let's try dividing by 4:
18,855,161 ÷ 4 = 4,713,790.25
If the quotient is a whole number, then 4 and 4,713,790.25 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 | 18,855,161 | |
| -1 | 18,855,161 |
If you did it right, you will end up with this table:
| 1 | 13 | 31 | 59 | 61 | 169 | 403 | 767 | 793 | 1,829 | 1,891 | 3,599 | 5,239 | 9,971 | 10,309 | 23,777 | 24,583 | 46,787 | 111,569 | 309,101 | 319,579 | 608,231 | 1,450,397 | 18,855,161 |
| -1 | -13 | -31 | -59 | -61 | -169 | -403 | -767 | -793 | -1,829 | -1,891 | -3,599 | -5,239 | -9,971 | -10,309 | -23,777 | -24,583 | -46,787 | -111,569 | -309,101 | -319,579 | -608,231 | -1,450,397 | -18,855,161 |
Here are some more numbers to try:
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