A:
Positive:
1 x 2103426055 x 4206852111 x 1912205555 x 3824411487 x 4319152435 x 863835357 x 392657853 x 26785
Negative:
-1 x -210342605-5 x -42068521-11 x -19122055-55 x -3824411-487 x -431915-2435 x -86383-5357 x -39265-7853 x -26785
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 210,342,605, 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 | 210,342,605 | |
| -1 | -210,342,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 210,342,605.
Example:
1 x 210,342,605 = 210,342,605
and
-1 x -210,342,605 = 210,342,605
Notice both answers equal 210,342,605
With that explanation out of the way, let's continue. Next, we take the number 210,342,605 and divide it by 2:
210,342,605 ÷ 2 = 105,171,302.5
If the quotient is a whole number, then 2 and 105,171,302.5 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 | 210,342,605 | |
| -1 | -210,342,605 |
Now, we try dividing 210,342,605 by 3:
210,342,605 ÷ 3 = 70,114,201.6667
If the quotient is a whole number, then 3 and 70,114,201.6667 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 | 210,342,605 | |
| -1 | -210,342,605 |
Let's try dividing by 4:
210,342,605 ÷ 4 = 52,585,651.25
If the quotient is a whole number, then 4 and 52,585,651.25 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 | 210,342,605 | |
| -1 | 210,342,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 487 | 2,435 | 5,357 | 7,853 | 26,785 | 39,265 | 86,383 | 431,915 | 3,824,411 | 19,122,055 | 42,068,521 | 210,342,605 |
| -1 | -5 | -11 | -55 | -487 | -2,435 | -5,357 | -7,853 | -26,785 | -39,265 | -86,383 | -431,915 | -3,824,411 | -19,122,055 | -42,068,521 | -210,342,605 |
Here are some more numbers to try:
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