A:
Positive:
1 x 1610711155 x 3221422347 x 3427045139 x 1158785235 x 685409695 x 2317574931 x 326656533 x 24655
Negative:
-1 x -161071115-5 x -32214223-47 x -3427045-139 x -1158785-235 x -685409-695 x -231757-4931 x -32665-6533 x -24655
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 161,071,115, 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 | 161,071,115 | |
| -1 | -161,071,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,071,115.
Example:
1 x 161,071,115 = 161,071,115
and
-1 x -161,071,115 = 161,071,115
Notice both answers equal 161,071,115
With that explanation out of the way, let's continue. Next, we take the number 161,071,115 and divide it by 2:
161,071,115 ÷ 2 = 80,535,557.5
If the quotient is a whole number, then 2 and 80,535,557.5 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 | 161,071,115 | |
| -1 | -161,071,115 |
Now, we try dividing 161,071,115 by 3:
161,071,115 ÷ 3 = 53,690,371.6667
If the quotient is a whole number, then 3 and 53,690,371.6667 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 | 161,071,115 | |
| -1 | -161,071,115 |
Let's try dividing by 4:
161,071,115 ÷ 4 = 40,267,778.75
If the quotient is a whole number, then 4 and 40,267,778.75 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 | 161,071,115 | |
| -1 | 161,071,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 139 | 235 | 695 | 4,931 | 6,533 | 24,655 | 32,665 | 231,757 | 685,409 | 1,158,785 | 3,427,045 | 32,214,223 | 161,071,115 |
| -1 | -5 | -47 | -139 | -235 | -695 | -4,931 | -6,533 | -24,655 | -32,665 | -231,757 | -685,409 | -1,158,785 | -3,427,045 | -32,214,223 | -161,071,115 |
Here are some more numbers to try:
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