A:
Positive:
1 x 1611633555 x 3223267143 x 3747985215 x 749597463 x 3480851619 x 995452315 x 696178095 x 19909
Negative:
-1 x -161163355-5 x -32232671-43 x -3747985-215 x -749597-463 x -348085-1619 x -99545-2315 x -69617-8095 x -19909
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 161,163,355, 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 | 161,163,355 | |
| -1 | -161,163,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 161,163,355.
Example:
1 x 161,163,355 = 161,163,355
and
-1 x -161,163,355 = 161,163,355
Notice both answers equal 161,163,355
With that explanation out of the way, let's continue. Next, we take the number 161,163,355 and divide it by 2:
161,163,355 ÷ 2 = 80,581,677.5
If the quotient is a whole number, then 2 and 80,581,677.5 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 | 161,163,355 | |
| -1 | -161,163,355 |
Now, we try dividing 161,163,355 by 3:
161,163,355 ÷ 3 = 53,721,118.3333
If the quotient is a whole number, then 3 and 53,721,118.3333 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 | 161,163,355 | |
| -1 | -161,163,355 |
Let's try dividing by 4:
161,163,355 ÷ 4 = 40,290,838.75
If the quotient is a whole number, then 4 and 40,290,838.75 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 | 161,163,355 | |
| -1 | 161,163,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 215 | 463 | 1,619 | 2,315 | 8,095 | 19,909 | 69,617 | 99,545 | 348,085 | 749,597 | 3,747,985 | 32,232,671 | 161,163,355 |
| -1 | -5 | -43 | -215 | -463 | -1,619 | -2,315 | -8,095 | -19,909 | -69,617 | -99,545 | -348,085 | -749,597 | -3,747,985 | -32,232,671 | -161,163,355 |
Here are some more numbers to try:
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