A:
Positive:
1 x 1627205455 x 3254410913 x 1251696565 x 2503393443 x 3673152215 x 734635651 x 287955759 x 28255
Negative:
-1 x -162720545-5 x -32544109-13 x -12516965-65 x -2503393-443 x -367315-2215 x -73463-5651 x -28795-5759 x -28255
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 162,720,545, 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 | 162,720,545 | |
| -1 | -162,720,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 162,720,545.
Example:
1 x 162,720,545 = 162,720,545
and
-1 x -162,720,545 = 162,720,545
Notice both answers equal 162,720,545
With that explanation out of the way, let's continue. Next, we take the number 162,720,545 and divide it by 2:
162,720,545 ÷ 2 = 81,360,272.5
If the quotient is a whole number, then 2 and 81,360,272.5 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 | 162,720,545 | |
| -1 | -162,720,545 |
Now, we try dividing 162,720,545 by 3:
162,720,545 ÷ 3 = 54,240,181.6667
If the quotient is a whole number, then 3 and 54,240,181.6667 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 | 162,720,545 | |
| -1 | -162,720,545 |
Let's try dividing by 4:
162,720,545 ÷ 4 = 40,680,136.25
If the quotient is a whole number, then 4 and 40,680,136.25 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 | 162,720,545 | |
| -1 | 162,720,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 443 | 2,215 | 5,651 | 5,759 | 28,255 | 28,795 | 73,463 | 367,315 | 2,503,393 | 12,516,965 | 32,544,109 | 162,720,545 |
| -1 | -5 | -13 | -65 | -443 | -2,215 | -5,651 | -5,759 | -28,255 | -28,795 | -73,463 | -367,315 | -2,503,393 | -12,516,965 | -32,544,109 | -162,720,545 |
Here are some more numbers to try:
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