A:
Positive:
1 x 1321999913 x 101692317 x 77764741 x 322439221 x 59819533 x 24803697 x 189671459 x 9061
Negative:
-1 x -13219999-13 x -1016923-17 x -777647-41 x -322439-221 x -59819-533 x -24803-697 x -18967-1459 x -9061
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 13,219,999, 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 | 13,219,999 | |
| -1 | -13,219,999 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,219,999.
Example:
1 x 13,219,999 = 13,219,999
and
-1 x -13,219,999 = 13,219,999
Notice both answers equal 13,219,999
With that explanation out of the way, let's continue. Next, we take the number 13,219,999 and divide it by 2:
13,219,999 ÷ 2 = 6,609,999.5
If the quotient is a whole number, then 2 and 6,609,999.5 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 | 13,219,999 | |
| -1 | -13,219,999 |
Now, we try dividing 13,219,999 by 3:
13,219,999 ÷ 3 = 4,406,666.3333
If the quotient is a whole number, then 3 and 4,406,666.3333 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 | 13,219,999 | |
| -1 | -13,219,999 |
Let's try dividing by 4:
13,219,999 ÷ 4 = 3,304,999.75
If the quotient is a whole number, then 4 and 3,304,999.75 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 | 13,219,999 | |
| -1 | 13,219,999 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 41 | 221 | 533 | 697 | 1,459 | 9,061 | 18,967 | 24,803 | 59,819 | 322,439 | 777,647 | 1,016,923 | 13,219,999 |
| -1 | -13 | -17 | -41 | -221 | -533 | -697 | -1,459 | -9,061 | -18,967 | -24,803 | -59,819 | -322,439 | -777,647 | -1,016,923 | -13,219,999 |
Here are some more numbers to try:
Try the factor calculator