A:
Positive:
1 x 1314556111 x 119505113 x 101119761 x 215501121 x 108641137 x 95953143 x 91927671 x 19591793 x 165771507 x 87231573 x 83571781 x 7381
Negative:
-1 x -13145561-11 x -1195051-13 x -1011197-61 x -215501-121 x -108641-137 x -95953-143 x -91927-671 x -19591-793 x -16577-1507 x -8723-1573 x -8357-1781 x -7381
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 13,145,561, 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 | 13,145,561 | |
| -1 | -13,145,561 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,145,561.
Example:
1 x 13,145,561 = 13,145,561
and
-1 x -13,145,561 = 13,145,561
Notice both answers equal 13,145,561
With that explanation out of the way, let's continue. Next, we take the number 13,145,561 and divide it by 2:
13,145,561 ÷ 2 = 6,572,780.5
If the quotient is a whole number, then 2 and 6,572,780.5 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 | 13,145,561 | |
| -1 | -13,145,561 |
Now, we try dividing 13,145,561 by 3:
13,145,561 ÷ 3 = 4,381,853.6667
If the quotient is a whole number, then 3 and 4,381,853.6667 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 | 13,145,561 | |
| -1 | -13,145,561 |
Let's try dividing by 4:
13,145,561 ÷ 4 = 3,286,390.25
If the quotient is a whole number, then 4 and 3,286,390.25 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 | 13,145,561 | |
| -1 | 13,145,561 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 61 | 121 | 137 | 143 | 671 | 793 | 1,507 | 1,573 | 1,781 | 7,381 | 8,357 | 8,723 | 16,577 | 19,591 | 91,927 | 95,953 | 108,641 | 215,501 | 1,011,197 | 1,195,051 | 13,145,561 |
| -1 | -11 | -13 | -61 | -121 | -137 | -143 | -671 | -793 | -1,507 | -1,573 | -1,781 | -7,381 | -8,357 | -8,723 | -16,577 | -19,591 | -91,927 | -95,953 | -108,641 | -215,501 | -1,011,197 | -1,195,051 | -13,145,561 |
Here are some more numbers to try:
Try the factor calculator