A:
Positive:
1 x 182203155 x 364406367 x 271945137 x 132995335 x 54389397 x 45895685 x 265991985 x 9179
Negative:
-1 x -18220315-5 x -3644063-67 x -271945-137 x -132995-335 x -54389-397 x -45895-685 x -26599-1985 x -9179
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 18,220,315, 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 | 18,220,315 | |
| -1 | -18,220,315 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,220,315.
Example:
1 x 18,220,315 = 18,220,315
and
-1 x -18,220,315 = 18,220,315
Notice both answers equal 18,220,315
With that explanation out of the way, let's continue. Next, we take the number 18,220,315 and divide it by 2:
18,220,315 ÷ 2 = 9,110,157.5
If the quotient is a whole number, then 2 and 9,110,157.5 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 | 18,220,315 | |
| -1 | -18,220,315 |
Now, we try dividing 18,220,315 by 3:
18,220,315 ÷ 3 = 6,073,438.3333
If the quotient is a whole number, then 3 and 6,073,438.3333 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 | 18,220,315 | |
| -1 | -18,220,315 |
Let's try dividing by 4:
18,220,315 ÷ 4 = 4,555,078.75
If the quotient is a whole number, then 4 and 4,555,078.75 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 | 18,220,315 | |
| -1 | 18,220,315 |
If you did it right, you will end up with this table:
| 1 | 5 | 67 | 137 | 335 | 397 | 685 | 1,985 | 9,179 | 26,599 | 45,895 | 54,389 | 132,995 | 271,945 | 3,644,063 | 18,220,315 |
| -1 | -5 | -67 | -137 | -335 | -397 | -685 | -1,985 | -9,179 | -26,599 | -45,895 | -54,389 | -132,995 | -271,945 | -3,644,063 | -18,220,315 |
Here are some more numbers to try:
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