A:
Positive:
1 x 183610217 x 262300331 x 592291191 x 96131217 x 84613443 x 414471337 x 137333101 x 5921
Negative:
-1 x -18361021-7 x -2623003-31 x -592291-191 x -96131-217 x -84613-443 x -41447-1337 x -13733-3101 x -5921
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 18,361,021, 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 | 18,361,021 | |
| -1 | -18,361,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,361,021.
Example:
1 x 18,361,021 = 18,361,021
and
-1 x -18,361,021 = 18,361,021
Notice both answers equal 18,361,021
With that explanation out of the way, let's continue. Next, we take the number 18,361,021 and divide it by 2:
18,361,021 ÷ 2 = 9,180,510.5
If the quotient is a whole number, then 2 and 9,180,510.5 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 | 18,361,021 | |
| -1 | -18,361,021 |
Now, we try dividing 18,361,021 by 3:
18,361,021 ÷ 3 = 6,120,340.3333
If the quotient is a whole number, then 3 and 6,120,340.3333 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 | 18,361,021 | |
| -1 | -18,361,021 |
Let's try dividing by 4:
18,361,021 ÷ 4 = 4,590,255.25
If the quotient is a whole number, then 4 and 4,590,255.25 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 | 18,361,021 | |
| -1 | 18,361,021 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 191 | 217 | 443 | 1,337 | 3,101 | 5,921 | 13,733 | 41,447 | 84,613 | 96,131 | 592,291 | 2,623,003 | 18,361,021 |
| -1 | -7 | -31 | -191 | -217 | -443 | -1,337 | -3,101 | -5,921 | -13,733 | -41,447 | -84,613 | -96,131 | -592,291 | -2,623,003 | -18,361,021 |
Here are some more numbers to try:
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