A:
Positive:
1 x 1645136655 x 3290273329 x 5672885145 x 1134577571 x 2881151987 x 827952855 x 576239935 x 16559
Negative:
-1 x -164513665-5 x -32902733-29 x -5672885-145 x -1134577-571 x -288115-1987 x -82795-2855 x -57623-9935 x -16559
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 164,513,665, 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 | 164,513,665 | |
| -1 | -164,513,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 164,513,665.
Example:
1 x 164,513,665 = 164,513,665
and
-1 x -164,513,665 = 164,513,665
Notice both answers equal 164,513,665
With that explanation out of the way, let's continue. Next, we take the number 164,513,665 and divide it by 2:
164,513,665 ÷ 2 = 82,256,832.5
If the quotient is a whole number, then 2 and 82,256,832.5 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 | 164,513,665 | |
| -1 | -164,513,665 |
Now, we try dividing 164,513,665 by 3:
164,513,665 ÷ 3 = 54,837,888.3333
If the quotient is a whole number, then 3 and 54,837,888.3333 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 | 164,513,665 | |
| -1 | -164,513,665 |
Let's try dividing by 4:
164,513,665 ÷ 4 = 41,128,416.25
If the quotient is a whole number, then 4 and 41,128,416.25 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 | 164,513,665 | |
| -1 | 164,513,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 571 | 1,987 | 2,855 | 9,935 | 16,559 | 57,623 | 82,795 | 288,115 | 1,134,577 | 5,672,885 | 32,902,733 | 164,513,665 |
| -1 | -5 | -29 | -145 | -571 | -1,987 | -2,855 | -9,935 | -16,559 | -57,623 | -82,795 | -288,115 | -1,134,577 | -5,672,885 | -32,902,733 | -164,513,665 |
Here are some more numbers to try:
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