A:
Positive:
1 x 1554026455 x 3108052943 x 3614015215 x 722803269 x 5777051345 x 1155412687 x 5783511567 x 13435
Negative:
-1 x -155402645-5 x -31080529-43 x -3614015-215 x -722803-269 x -577705-1345 x -115541-2687 x -57835-11567 x -13435
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 155,402,645, 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 | 155,402,645 | |
| -1 | -155,402,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,402,645.
Example:
1 x 155,402,645 = 155,402,645
and
-1 x -155,402,645 = 155,402,645
Notice both answers equal 155,402,645
With that explanation out of the way, let's continue. Next, we take the number 155,402,645 and divide it by 2:
155,402,645 ÷ 2 = 77,701,322.5
If the quotient is a whole number, then 2 and 77,701,322.5 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 | 155,402,645 | |
| -1 | -155,402,645 |
Now, we try dividing 155,402,645 by 3:
155,402,645 ÷ 3 = 51,800,881.6667
If the quotient is a whole number, then 3 and 51,800,881.6667 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 | 155,402,645 | |
| -1 | -155,402,645 |
Let's try dividing by 4:
155,402,645 ÷ 4 = 38,850,661.25
If the quotient is a whole number, then 4 and 38,850,661.25 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 | 155,402,645 | |
| -1 | 155,402,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 215 | 269 | 1,345 | 2,687 | 11,567 | 13,435 | 57,835 | 115,541 | 577,705 | 722,803 | 3,614,015 | 31,080,529 | 155,402,645 |
| -1 | -5 | -43 | -215 | -269 | -1,345 | -2,687 | -11,567 | -13,435 | -57,835 | -115,541 | -577,705 | -722,803 | -3,614,015 | -31,080,529 | -155,402,645 |
Here are some more numbers to try:
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