A:
Positive:
1 x 200702155 x 401404311 x 182456555 x 364913101 x 198715505 x 397431111 x 180653613 x 5555
Negative:
-1 x -20070215-5 x -4014043-11 x -1824565-55 x -364913-101 x -198715-505 x -39743-1111 x -18065-3613 x -5555
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 20,070,215, 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 | 20,070,215 | |
| -1 | -20,070,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,070,215.
Example:
1 x 20,070,215 = 20,070,215
and
-1 x -20,070,215 = 20,070,215
Notice both answers equal 20,070,215
With that explanation out of the way, let's continue. Next, we take the number 20,070,215 and divide it by 2:
20,070,215 ÷ 2 = 10,035,107.5
If the quotient is a whole number, then 2 and 10,035,107.5 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 | 20,070,215 | |
| -1 | -20,070,215 |
Now, we try dividing 20,070,215 by 3:
20,070,215 ÷ 3 = 6,690,071.6667
If the quotient is a whole number, then 3 and 6,690,071.6667 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 | 20,070,215 | |
| -1 | -20,070,215 |
Let's try dividing by 4:
20,070,215 ÷ 4 = 5,017,553.75
If the quotient is a whole number, then 4 and 5,017,553.75 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 | 20,070,215 | |
| -1 | 20,070,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 101 | 505 | 1,111 | 3,613 | 5,555 | 18,065 | 39,743 | 198,715 | 364,913 | 1,824,565 | 4,014,043 | 20,070,215 |
| -1 | -5 | -11 | -55 | -101 | -505 | -1,111 | -3,613 | -5,555 | -18,065 | -39,743 | -198,715 | -364,913 | -1,824,565 | -4,014,043 | -20,070,215 |
Here are some more numbers to try:
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