A:
Positive:
1 x 1535125155 x 3070250313 x 1180865529 x 529353565 x 2361731145 x 1058707377 x 4071951885 x 81439
Negative:
-1 x -153512515-5 x -30702503-13 x -11808655-29 x -5293535-65 x -2361731-145 x -1058707-377 x -407195-1885 x -81439
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 153,512,515, 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 | 153,512,515 | |
| -1 | -153,512,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 153,512,515.
Example:
1 x 153,512,515 = 153,512,515
and
-1 x -153,512,515 = 153,512,515
Notice both answers equal 153,512,515
With that explanation out of the way, let's continue. Next, we take the number 153,512,515 and divide it by 2:
153,512,515 ÷ 2 = 76,756,257.5
If the quotient is a whole number, then 2 and 76,756,257.5 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 | 153,512,515 | |
| -1 | -153,512,515 |
Now, we try dividing 153,512,515 by 3:
153,512,515 ÷ 3 = 51,170,838.3333
If the quotient is a whole number, then 3 and 51,170,838.3333 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 | 153,512,515 | |
| -1 | -153,512,515 |
Let's try dividing by 4:
153,512,515 ÷ 4 = 38,378,128.75
If the quotient is a whole number, then 4 and 38,378,128.75 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 | 153,512,515 | |
| -1 | 153,512,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 29 | 65 | 145 | 377 | 1,885 | 81,439 | 407,195 | 1,058,707 | 2,361,731 | 5,293,535 | 11,808,655 | 30,702,503 | 153,512,515 |
| -1 | -5 | -13 | -29 | -65 | -145 | -377 | -1,885 | -81,439 | -407,195 | -1,058,707 | -2,361,731 | -5,293,535 | -11,808,655 | -30,702,503 | -153,512,515 |
Here are some more numbers to try:
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