A:
Positive:
1 x 78704638111 x 71549671103 x 7641227109 x 72206091133 x 6946571199 x 6564196373 x 12349711227 x 70103
Negative:
-1 x -787046381-11 x -71549671-103 x -7641227-109 x -7220609-1133 x -694657-1199 x -656419-6373 x -123497-11227 x -70103
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 787,046,381, 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 | 787,046,381 | |
| -1 | -787,046,381 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 787,046,381.
Example:
1 x 787,046,381 = 787,046,381
and
-1 x -787,046,381 = 787,046,381
Notice both answers equal 787,046,381
With that explanation out of the way, let's continue. Next, we take the number 787,046,381 and divide it by 2:
787,046,381 ÷ 2 = 393,523,190.5
If the quotient is a whole number, then 2 and 393,523,190.5 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 | 787,046,381 | |
| -1 | -787,046,381 |
Now, we try dividing 787,046,381 by 3:
787,046,381 ÷ 3 = 262,348,793.6667
If the quotient is a whole number, then 3 and 262,348,793.6667 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 | 787,046,381 | |
| -1 | -787,046,381 |
Let's try dividing by 4:
787,046,381 ÷ 4 = 196,761,595.25
If the quotient is a whole number, then 4 and 196,761,595.25 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 | 787,046,381 | |
| -1 | 787,046,381 |
If you did it right, you will end up with this table:
| 1 | 11 | 103 | 109 | 1,133 | 1,199 | 6,373 | 11,227 | 70,103 | 123,497 | 656,419 | 694,657 | 7,220,609 | 7,641,227 | 71,549,671 | 787,046,381 |
| -1 | -11 | -103 | -109 | -1,133 | -1,199 | -6,373 | -11,227 | -70,103 | -123,497 | -656,419 | -694,657 | -7,220,609 | -7,641,227 | -71,549,671 | -787,046,381 |
Here are some more numbers to try:
Try the factor calculator