A:
Positive:
1 x 1615550655 x 323110137 x 2307929535 x 4615859557 x 2900452785 x 580093899 x 414358287 x 19495
Negative:
-1 x -161555065-5 x -32311013-7 x -23079295-35 x -4615859-557 x -290045-2785 x -58009-3899 x -41435-8287 x -19495
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 161,555,065, 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 | 161,555,065 | |
| -1 | -161,555,065 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,555,065.
Example:
1 x 161,555,065 = 161,555,065
and
-1 x -161,555,065 = 161,555,065
Notice both answers equal 161,555,065
With that explanation out of the way, let's continue. Next, we take the number 161,555,065 and divide it by 2:
161,555,065 ÷ 2 = 80,777,532.5
If the quotient is a whole number, then 2 and 80,777,532.5 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 | 161,555,065 | |
| -1 | -161,555,065 |
Now, we try dividing 161,555,065 by 3:
161,555,065 ÷ 3 = 53,851,688.3333
If the quotient is a whole number, then 3 and 53,851,688.3333 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 | 161,555,065 | |
| -1 | -161,555,065 |
Let's try dividing by 4:
161,555,065 ÷ 4 = 40,388,766.25
If the quotient is a whole number, then 4 and 40,388,766.25 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 | 161,555,065 | |
| -1 | 161,555,065 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 557 | 2,785 | 3,899 | 8,287 | 19,495 | 41,435 | 58,009 | 290,045 | 4,615,859 | 23,079,295 | 32,311,013 | 161,555,065 |
| -1 | -5 | -7 | -35 | -557 | -2,785 | -3,899 | -8,287 | -19,495 | -41,435 | -58,009 | -290,045 | -4,615,859 | -23,079,295 | -32,311,013 | -161,555,065 |
Here are some more numbers to try:
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