A:
Positive:
1 x 1632176655 x 3264353313 x 1255520565 x 2511041169 x 965785233 x 700505829 x 196885845 x 1931571165 x 1401013029 x 538854145 x 3937710777 x 15145
Negative:
-1 x -163217665-5 x -32643533-13 x -12555205-65 x -2511041-169 x -965785-233 x -700505-829 x -196885-845 x -193157-1165 x -140101-3029 x -53885-4145 x -39377-10777 x -15145
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 163,217,665, 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 | 163,217,665 | |
| -1 | -163,217,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 163,217,665.
Example:
1 x 163,217,665 = 163,217,665
and
-1 x -163,217,665 = 163,217,665
Notice both answers equal 163,217,665
With that explanation out of the way, let's continue. Next, we take the number 163,217,665 and divide it by 2:
163,217,665 ÷ 2 = 81,608,832.5
If the quotient is a whole number, then 2 and 81,608,832.5 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 | 163,217,665 | |
| -1 | -163,217,665 |
Now, we try dividing 163,217,665 by 3:
163,217,665 ÷ 3 = 54,405,888.3333
If the quotient is a whole number, then 3 and 54,405,888.3333 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 | 163,217,665 | |
| -1 | -163,217,665 |
Let's try dividing by 4:
163,217,665 ÷ 4 = 40,804,416.25
If the quotient is a whole number, then 4 and 40,804,416.25 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 | 163,217,665 | |
| -1 | 163,217,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 169 | 233 | 829 | 845 | 1,165 | 3,029 | 4,145 | 10,777 | 15,145 | 39,377 | 53,885 | 140,101 | 193,157 | 196,885 | 700,505 | 965,785 | 2,511,041 | 12,555,205 | 32,643,533 | 163,217,665 |
| -1 | -5 | -13 | -65 | -169 | -233 | -829 | -845 | -1,165 | -3,029 | -4,145 | -10,777 | -15,145 | -39,377 | -53,885 | -140,101 | -193,157 | -196,885 | -700,505 | -965,785 | -2,511,041 | -12,555,205 | -32,643,533 | -163,217,665 |
Here are some more numbers to try:
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