A:
Positive:
1 x 2101431255 x 4202862525 x 8405725101 x 2080625125 x 1681145505 x 416125625 x 3362292525 x 832253329 x 6312512625 x 16645
Negative:
-1 x -210143125-5 x -42028625-25 x -8405725-101 x -2080625-125 x -1681145-505 x -416125-625 x -336229-2525 x -83225-3329 x -63125-12625 x -16645
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 210,143,125, 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 | 210,143,125 | |
| -1 | -210,143,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 210,143,125.
Example:
1 x 210,143,125 = 210,143,125
and
-1 x -210,143,125 = 210,143,125
Notice both answers equal 210,143,125
With that explanation out of the way, let's continue. Next, we take the number 210,143,125 and divide it by 2:
210,143,125 ÷ 2 = 105,071,562.5
If the quotient is a whole number, then 2 and 105,071,562.5 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 | 210,143,125 | |
| -1 | -210,143,125 |
Now, we try dividing 210,143,125 by 3:
210,143,125 ÷ 3 = 70,047,708.3333
If the quotient is a whole number, then 3 and 70,047,708.3333 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 | 210,143,125 | |
| -1 | -210,143,125 |
Let's try dividing by 4:
210,143,125 ÷ 4 = 52,535,781.25
If the quotient is a whole number, then 4 and 52,535,781.25 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 | 210,143,125 | |
| -1 | 210,143,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 101 | 125 | 505 | 625 | 2,525 | 3,329 | 12,625 | 16,645 | 63,125 | 83,225 | 336,229 | 416,125 | 1,681,145 | 2,080,625 | 8,405,725 | 42,028,625 | 210,143,125 |
| -1 | -5 | -25 | -101 | -125 | -505 | -625 | -2,525 | -3,329 | -12,625 | -16,645 | -63,125 | -83,225 | -336,229 | -416,125 | -1,681,145 | -2,080,625 | -8,405,725 | -42,028,625 | -210,143,125 |
Here are some more numbers to try:
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