A:
Positive:
1 x 15513551313 x 1193350119 x 816502741 x 3783793247 x 628079533 x 291061779 x 19914710127 x 15319
Negative:
-1 x -155135513-13 x -11933501-19 x -8165027-41 x -3783793-247 x -628079-533 x -291061-779 x -199147-10127 x -15319
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 155,135,513, 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 | 155,135,513 | |
| -1 | -155,135,513 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,135,513.
Example:
1 x 155,135,513 = 155,135,513
and
-1 x -155,135,513 = 155,135,513
Notice both answers equal 155,135,513
With that explanation out of the way, let's continue. Next, we take the number 155,135,513 and divide it by 2:
155,135,513 ÷ 2 = 77,567,756.5
If the quotient is a whole number, then 2 and 77,567,756.5 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 | 155,135,513 | |
| -1 | -155,135,513 |
Now, we try dividing 155,135,513 by 3:
155,135,513 ÷ 3 = 51,711,837.6667
If the quotient is a whole number, then 3 and 51,711,837.6667 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 | 155,135,513 | |
| -1 | -155,135,513 |
Let's try dividing by 4:
155,135,513 ÷ 4 = 38,783,878.25
If the quotient is a whole number, then 4 and 38,783,878.25 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 | 155,135,513 | |
| -1 | 155,135,513 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 41 | 247 | 533 | 779 | 10,127 | 15,319 | 199,147 | 291,061 | 628,079 | 3,783,793 | 8,165,027 | 11,933,501 | 155,135,513 |
| -1 | -13 | -19 | -41 | -247 | -533 | -779 | -10,127 | -15,319 | -199,147 | -291,061 | -628,079 | -3,783,793 | -8,165,027 | -11,933,501 | -155,135,513 |
Here are some more numbers to try:
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