A:
Positive:
1 x 151071555 x 30214317 x 215816535 x 431633653 x 23135661 x 228553265 x 46273305 x 4571
Negative:
-1 x -15107155-5 x -3021431-7 x -2158165-35 x -431633-653 x -23135-661 x -22855-3265 x -4627-3305 x -4571
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 15,107,155, 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 | 15,107,155 | |
| -1 | -15,107,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,107,155.
Example:
1 x 15,107,155 = 15,107,155
and
-1 x -15,107,155 = 15,107,155
Notice both answers equal 15,107,155
With that explanation out of the way, let's continue. Next, we take the number 15,107,155 and divide it by 2:
15,107,155 ÷ 2 = 7,553,577.5
If the quotient is a whole number, then 2 and 7,553,577.5 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 | 15,107,155 | |
| -1 | -15,107,155 |
Now, we try dividing 15,107,155 by 3:
15,107,155 ÷ 3 = 5,035,718.3333
If the quotient is a whole number, then 3 and 5,035,718.3333 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 | 15,107,155 | |
| -1 | -15,107,155 |
Let's try dividing by 4:
15,107,155 ÷ 4 = 3,776,788.75
If the quotient is a whole number, then 4 and 3,776,788.75 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 | 15,107,155 | |
| -1 | 15,107,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 653 | 661 | 3,265 | 3,305 | 4,571 | 4,627 | 22,855 | 23,135 | 431,633 | 2,158,165 | 3,021,431 | 15,107,155 |
| -1 | -5 | -7 | -35 | -653 | -661 | -3,265 | -3,305 | -4,571 | -4,627 | -22,855 | -23,135 | -431,633 | -2,158,165 | -3,021,431 | -15,107,155 |
Here are some more numbers to try:
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