A:
Positive:
1 x 155016555 x 310033113 x 119243523 x 67398565 x 238487115 x 134797299 x 518451495 x 10369
Negative:
-1 x -15501655-5 x -3100331-13 x -1192435-23 x -673985-65 x -238487-115 x -134797-299 x -51845-1495 x -10369
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 15,501,655, 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 | 15,501,655 | |
| -1 | -15,501,655 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,501,655.
Example:
1 x 15,501,655 = 15,501,655
and
-1 x -15,501,655 = 15,501,655
Notice both answers equal 15,501,655
With that explanation out of the way, let's continue. Next, we take the number 15,501,655 and divide it by 2:
15,501,655 ÷ 2 = 7,750,827.5
If the quotient is a whole number, then 2 and 7,750,827.5 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 | 15,501,655 | |
| -1 | -15,501,655 |
Now, we try dividing 15,501,655 by 3:
15,501,655 ÷ 3 = 5,167,218.3333
If the quotient is a whole number, then 3 and 5,167,218.3333 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 | 15,501,655 | |
| -1 | -15,501,655 |
Let's try dividing by 4:
15,501,655 ÷ 4 = 3,875,413.75
If the quotient is a whole number, then 4 and 3,875,413.75 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 | 15,501,655 | |
| -1 | 15,501,655 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 23 | 65 | 115 | 299 | 1,495 | 10,369 | 51,845 | 134,797 | 238,487 | 673,985 | 1,192,435 | 3,100,331 | 15,501,655 |
| -1 | -5 | -13 | -23 | -65 | -115 | -299 | -1,495 | -10,369 | -51,845 | -134,797 | -238,487 | -673,985 | -1,192,435 | -3,100,331 | -15,501,655 |
Here are some more numbers to try:
Try the factor calculator