A:
Positive:
1 x 2101553055 x 42031061167 x 1258415389 x 540245647 x 324815835 x 2516831945 x 1080493235 x 64963
Negative:
-1 x -210155305-5 x -42031061-167 x -1258415-389 x -540245-647 x -324815-835 x -251683-1945 x -108049-3235 x -64963
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 210,155,305, 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 | 210,155,305 | |
| -1 | -210,155,305 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 210,155,305.
Example:
1 x 210,155,305 = 210,155,305
and
-1 x -210,155,305 = 210,155,305
Notice both answers equal 210,155,305
With that explanation out of the way, let's continue. Next, we take the number 210,155,305 and divide it by 2:
210,155,305 ÷ 2 = 105,077,652.5
If the quotient is a whole number, then 2 and 105,077,652.5 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 | 210,155,305 | |
| -1 | -210,155,305 |
Now, we try dividing 210,155,305 by 3:
210,155,305 ÷ 3 = 70,051,768.3333
If the quotient is a whole number, then 3 and 70,051,768.3333 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 | 210,155,305 | |
| -1 | -210,155,305 |
Let's try dividing by 4:
210,155,305 ÷ 4 = 52,538,826.25
If the quotient is a whole number, then 4 and 52,538,826.25 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 | 210,155,305 | |
| -1 | 210,155,305 |
If you did it right, you will end up with this table:
| 1 | 5 | 167 | 389 | 647 | 835 | 1,945 | 3,235 | 64,963 | 108,049 | 251,683 | 324,815 | 540,245 | 1,258,415 | 42,031,061 | 210,155,305 |
| -1 | -5 | -167 | -389 | -647 | -835 | -1,945 | -3,235 | -64,963 | -108,049 | -251,683 | -324,815 | -540,245 | -1,258,415 | -42,031,061 | -210,155,305 |
Here are some more numbers to try:
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