A:
Positive:
1 x 1550055111 x 140914123 x 673937197 x 78683253 x 61267311 x 498412167 x 71533421 x 4531
Negative:
-1 x -15500551-11 x -1409141-23 x -673937-197 x -78683-253 x -61267-311 x -49841-2167 x -7153-3421 x -4531
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 15,500,551, 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 | 15,500,551 | |
| -1 | -15,500,551 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,500,551.
Example:
1 x 15,500,551 = 15,500,551
and
-1 x -15,500,551 = 15,500,551
Notice both answers equal 15,500,551
With that explanation out of the way, let's continue. Next, we take the number 15,500,551 and divide it by 2:
15,500,551 ÷ 2 = 7,750,275.5
If the quotient is a whole number, then 2 and 7,750,275.5 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 | 15,500,551 | |
| -1 | -15,500,551 |
Now, we try dividing 15,500,551 by 3:
15,500,551 ÷ 3 = 5,166,850.3333
If the quotient is a whole number, then 3 and 5,166,850.3333 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 | 15,500,551 | |
| -1 | -15,500,551 |
Let's try dividing by 4:
15,500,551 ÷ 4 = 3,875,137.75
If the quotient is a whole number, then 4 and 3,875,137.75 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 | 15,500,551 | |
| -1 | 15,500,551 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 197 | 253 | 311 | 2,167 | 3,421 | 4,531 | 7,153 | 49,841 | 61,267 | 78,683 | 673,937 | 1,409,141 | 15,500,551 |
| -1 | -11 | -23 | -197 | -253 | -311 | -2,167 | -3,421 | -4,531 | -7,153 | -49,841 | -61,267 | -78,683 | -673,937 | -1,409,141 | -15,500,551 |
Here are some more numbers to try:
Try the factor calculator