A:
Positive:
1 x 71715055 x 143430111 x 65195555 x 130391101 x 71005505 x 142011111 x 64551291 x 5555
Negative:
-1 x -7171505-5 x -1434301-11 x -651955-55 x -130391-101 x -71005-505 x -14201-1111 x -6455-1291 x -5555
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 7,171,505, 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 | 7,171,505 | |
| -1 | -7,171,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,171,505.
Example:
1 x 7,171,505 = 7,171,505
and
-1 x -7,171,505 = 7,171,505
Notice both answers equal 7,171,505
With that explanation out of the way, let's continue. Next, we take the number 7,171,505 and divide it by 2:
7,171,505 ÷ 2 = 3,585,752.5
If the quotient is a whole number, then 2 and 3,585,752.5 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 | 7,171,505 | |
| -1 | -7,171,505 |
Now, we try dividing 7,171,505 by 3:
7,171,505 ÷ 3 = 2,390,501.6667
If the quotient is a whole number, then 3 and 2,390,501.6667 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 | 7,171,505 | |
| -1 | -7,171,505 |
Let's try dividing by 4:
7,171,505 ÷ 4 = 1,792,876.25
If the quotient is a whole number, then 4 and 1,792,876.25 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 | 7,171,505 | |
| -1 | 7,171,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 101 | 505 | 1,111 | 1,291 | 5,555 | 6,455 | 14,201 | 71,005 | 130,391 | 651,955 | 1,434,301 | 7,171,505 |
| -1 | -5 | -11 | -55 | -101 | -505 | -1,111 | -1,291 | -5,555 | -6,455 | -14,201 | -71,005 | -130,391 | -651,955 | -1,434,301 | -7,171,505 |
Here are some more numbers to try:
Try the factor calculator