A:
Positive:
1 x 153857355 x 307714723 x 668945115 x 133789337 x 45655397 x 387551685 x 91311985 x 7751
Negative:
-1 x -15385735-5 x -3077147-23 x -668945-115 x -133789-337 x -45655-397 x -38755-1685 x -9131-1985 x -7751
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 15,385,735, 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 | 15,385,735 | |
| -1 | -15,385,735 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,385,735.
Example:
1 x 15,385,735 = 15,385,735
and
-1 x -15,385,735 = 15,385,735
Notice both answers equal 15,385,735
With that explanation out of the way, let's continue. Next, we take the number 15,385,735 and divide it by 2:
15,385,735 ÷ 2 = 7,692,867.5
If the quotient is a whole number, then 2 and 7,692,867.5 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 | 15,385,735 | |
| -1 | -15,385,735 |
Now, we try dividing 15,385,735 by 3:
15,385,735 ÷ 3 = 5,128,578.3333
If the quotient is a whole number, then 3 and 5,128,578.3333 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 | 15,385,735 | |
| -1 | -15,385,735 |
Let's try dividing by 4:
15,385,735 ÷ 4 = 3,846,433.75
If the quotient is a whole number, then 4 and 3,846,433.75 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 | 15,385,735 | |
| -1 | 15,385,735 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 337 | 397 | 1,685 | 1,985 | 7,751 | 9,131 | 38,755 | 45,655 | 133,789 | 668,945 | 3,077,147 | 15,385,735 |
| -1 | -5 | -23 | -115 | -337 | -397 | -1,685 | -1,985 | -7,751 | -9,131 | -38,755 | -45,655 | -133,789 | -668,945 | -3,077,147 | -15,385,735 |
Here are some more numbers to try:
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