A:
Positive:
1 x 159105055 x 318210113 x 122388519 x 83739565 x 24477795 x 167479169 x 94145247 x 64415845 x 18829991 x 160551235 x 128833211 x 4955
Negative:
-1 x -15910505-5 x -3182101-13 x -1223885-19 x -837395-65 x -244777-95 x -167479-169 x -94145-247 x -64415-845 x -18829-991 x -16055-1235 x -12883-3211 x -4955
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 15,910,505, 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 | 15,910,505 | |
| -1 | -15,910,505 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,910,505.
Example:
1 x 15,910,505 = 15,910,505
and
-1 x -15,910,505 = 15,910,505
Notice both answers equal 15,910,505
With that explanation out of the way, let's continue. Next, we take the number 15,910,505 and divide it by 2:
15,910,505 ÷ 2 = 7,955,252.5
If the quotient is a whole number, then 2 and 7,955,252.5 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 | 15,910,505 | |
| -1 | -15,910,505 |
Now, we try dividing 15,910,505 by 3:
15,910,505 ÷ 3 = 5,303,501.6667
If the quotient is a whole number, then 3 and 5,303,501.6667 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 | 15,910,505 | |
| -1 | -15,910,505 |
Let's try dividing by 4:
15,910,505 ÷ 4 = 3,977,626.25
If the quotient is a whole number, then 4 and 3,977,626.25 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 | 15,910,505 | |
| -1 | 15,910,505 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 19 | 65 | 95 | 169 | 247 | 845 | 991 | 1,235 | 3,211 | 4,955 | 12,883 | 16,055 | 18,829 | 64,415 | 94,145 | 167,479 | 244,777 | 837,395 | 1,223,885 | 3,182,101 | 15,910,505 |
| -1 | -5 | -13 | -19 | -65 | -95 | -169 | -247 | -845 | -991 | -1,235 | -3,211 | -4,955 | -12,883 | -16,055 | -18,829 | -64,415 | -94,145 | -167,479 | -244,777 | -837,395 | -1,223,885 | -3,182,101 | -15,910,505 |
Here are some more numbers to try:
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