A:
Positive:
1 x 1613925117 x 2305607329 x 556525989 x 1813399203 x 795037623 x 2590572581 x 625318933 x 18067
Negative:
-1 x -161392511-7 x -23056073-29 x -5565259-89 x -1813399-203 x -795037-623 x -259057-2581 x -62531-8933 x -18067
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 161,392,511, 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 | 161,392,511 | |
| -1 | -161,392,511 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,392,511.
Example:
1 x 161,392,511 = 161,392,511
and
-1 x -161,392,511 = 161,392,511
Notice both answers equal 161,392,511
With that explanation out of the way, let's continue. Next, we take the number 161,392,511 and divide it by 2:
161,392,511 ÷ 2 = 80,696,255.5
If the quotient is a whole number, then 2 and 80,696,255.5 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 | 161,392,511 | |
| -1 | -161,392,511 |
Now, we try dividing 161,392,511 by 3:
161,392,511 ÷ 3 = 53,797,503.6667
If the quotient is a whole number, then 3 and 53,797,503.6667 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 | 161,392,511 | |
| -1 | -161,392,511 |
Let's try dividing by 4:
161,392,511 ÷ 4 = 40,348,127.75
If the quotient is a whole number, then 4 and 40,348,127.75 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 | 161,392,511 | |
| -1 | 161,392,511 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 89 | 203 | 623 | 2,581 | 8,933 | 18,067 | 62,531 | 259,057 | 795,037 | 1,813,399 | 5,565,259 | 23,056,073 | 161,392,511 |
| -1 | -7 | -29 | -89 | -203 | -623 | -2,581 | -8,933 | -18,067 | -62,531 | -259,057 | -795,037 | -1,813,399 | -5,565,259 | -23,056,073 | -161,392,511 |
Here are some more numbers to try:
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