A:
Positive:
1 x 1554235455 x 31084709139 x 1118155151 x 1029295695 x 223631755 x 2058591481 x 1049457405 x 20989
Negative:
-1 x -155423545-5 x -31084709-139 x -1118155-151 x -1029295-695 x -223631-755 x -205859-1481 x -104945-7405 x -20989
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 155,423,545, 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 | 155,423,545 | |
| -1 | -155,423,545 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,423,545.
Example:
1 x 155,423,545 = 155,423,545
and
-1 x -155,423,545 = 155,423,545
Notice both answers equal 155,423,545
With that explanation out of the way, let's continue. Next, we take the number 155,423,545 and divide it by 2:
155,423,545 ÷ 2 = 77,711,772.5
If the quotient is a whole number, then 2 and 77,711,772.5 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 | 155,423,545 | |
| -1 | -155,423,545 |
Now, we try dividing 155,423,545 by 3:
155,423,545 ÷ 3 = 51,807,848.3333
If the quotient is a whole number, then 3 and 51,807,848.3333 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 | 155,423,545 | |
| -1 | -155,423,545 |
Let's try dividing by 4:
155,423,545 ÷ 4 = 38,855,886.25
If the quotient is a whole number, then 4 and 38,855,886.25 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 | 155,423,545 | |
| -1 | 155,423,545 |
If you did it right, you will end up with this table:
| 1 | 5 | 139 | 151 | 695 | 755 | 1,481 | 7,405 | 20,989 | 104,945 | 205,859 | 223,631 | 1,029,295 | 1,118,155 | 31,084,709 | 155,423,545 |
| -1 | -5 | -139 | -151 | -695 | -755 | -1,481 | -7,405 | -20,989 | -104,945 | -205,859 | -223,631 | -1,029,295 | -1,118,155 | -31,084,709 | -155,423,545 |
Here are some more numbers to try:
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