A:
Positive:
1 x 131006155 x 262012311 x 119096555 x 238193313 x 41855761 x 172151565 x 83713443 x 3805
Negative:
-1 x -13100615-5 x -2620123-11 x -1190965-55 x -238193-313 x -41855-761 x -17215-1565 x -8371-3443 x -3805
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 13,100,615, 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 | 13,100,615 | |
| -1 | -13,100,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,100,615.
Example:
1 x 13,100,615 = 13,100,615
and
-1 x -13,100,615 = 13,100,615
Notice both answers equal 13,100,615
With that explanation out of the way, let's continue. Next, we take the number 13,100,615 and divide it by 2:
13,100,615 ÷ 2 = 6,550,307.5
If the quotient is a whole number, then 2 and 6,550,307.5 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 | 13,100,615 | |
| -1 | -13,100,615 |
Now, we try dividing 13,100,615 by 3:
13,100,615 ÷ 3 = 4,366,871.6667
If the quotient is a whole number, then 3 and 4,366,871.6667 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 | 13,100,615 | |
| -1 | -13,100,615 |
Let's try dividing by 4:
13,100,615 ÷ 4 = 3,275,153.75
If the quotient is a whole number, then 4 and 3,275,153.75 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 | 13,100,615 | |
| -1 | 13,100,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 313 | 761 | 1,565 | 3,443 | 3,805 | 8,371 | 17,215 | 41,855 | 238,193 | 1,190,965 | 2,620,123 | 13,100,615 |
| -1 | -5 | -11 | -55 | -313 | -761 | -1,565 | -3,443 | -3,805 | -8,371 | -17,215 | -41,855 | -238,193 | -1,190,965 | -2,620,123 | -13,100,615 |
Here are some more numbers to try:
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