A:
Positive:
1 x 13521652111 x 1229241117 x 795391319 x 7116659187 x 723083209 x 646969323 x 418627361 x 3745612003 x 675073553 x 380573971 x 340516137 x 22033
Negative:
-1 x -135216521-11 x -12292411-17 x -7953913-19 x -7116659-187 x -723083-209 x -646969-323 x -418627-361 x -374561-2003 x -67507-3553 x -38057-3971 x -34051-6137 x -22033
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 135,216,521, 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 | 135,216,521 | |
| -1 | -135,216,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 135,216,521.
Example:
1 x 135,216,521 = 135,216,521
and
-1 x -135,216,521 = 135,216,521
Notice both answers equal 135,216,521
With that explanation out of the way, let's continue. Next, we take the number 135,216,521 and divide it by 2:
135,216,521 ÷ 2 = 67,608,260.5
If the quotient is a whole number, then 2 and 67,608,260.5 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 | 135,216,521 | |
| -1 | -135,216,521 |
Now, we try dividing 135,216,521 by 3:
135,216,521 ÷ 3 = 45,072,173.6667
If the quotient is a whole number, then 3 and 45,072,173.6667 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 | 135,216,521 | |
| -1 | -135,216,521 |
Let's try dividing by 4:
135,216,521 ÷ 4 = 33,804,130.25
If the quotient is a whole number, then 4 and 33,804,130.25 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 | 135,216,521 | |
| -1 | 135,216,521 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 19 | 187 | 209 | 323 | 361 | 2,003 | 3,553 | 3,971 | 6,137 | 22,033 | 34,051 | 38,057 | 67,507 | 374,561 | 418,627 | 646,969 | 723,083 | 7,116,659 | 7,953,913 | 12,292,411 | 135,216,521 |
| -1 | -11 | -17 | -19 | -187 | -209 | -323 | -361 | -2,003 | -3,553 | -3,971 | -6,137 | -22,033 | -34,051 | -38,057 | -67,507 | -374,561 | -418,627 | -646,969 | -723,083 | -7,116,659 | -7,953,913 | -12,292,411 | -135,216,521 |
Here are some more numbers to try:
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