A:
Positive:
1 x 77128750117 x 4536985319 x 40594079211 x 3655391323 x 23878873587 x 2150234009 x 19238911317 x 68153
Negative:
-1 x -771287501-17 x -45369853-19 x -40594079-211 x -3655391-323 x -2387887-3587 x -215023-4009 x -192389-11317 x -68153
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 771,287,501, 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 | 771,287,501 | |
| -1 | -771,287,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 771,287,501.
Example:
1 x 771,287,501 = 771,287,501
and
-1 x -771,287,501 = 771,287,501
Notice both answers equal 771,287,501
With that explanation out of the way, let's continue. Next, we take the number 771,287,501 and divide it by 2:
771,287,501 ÷ 2 = 385,643,750.5
If the quotient is a whole number, then 2 and 385,643,750.5 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 | 771,287,501 | |
| -1 | -771,287,501 |
Now, we try dividing 771,287,501 by 3:
771,287,501 ÷ 3 = 257,095,833.6667
If the quotient is a whole number, then 3 and 257,095,833.6667 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 | 771,287,501 | |
| -1 | -771,287,501 |
Let's try dividing by 4:
771,287,501 ÷ 4 = 192,821,875.25
If the quotient is a whole number, then 4 and 192,821,875.25 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 | 771,287,501 | |
| -1 | 771,287,501 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 211 | 323 | 3,587 | 4,009 | 11,317 | 68,153 | 192,389 | 215,023 | 2,387,887 | 3,655,391 | 40,594,079 | 45,369,853 | 771,287,501 |
| -1 | -17 | -19 | -211 | -323 | -3,587 | -4,009 | -11,317 | -68,153 | -192,389 | -215,023 | -2,387,887 | -3,655,391 | -40,594,079 | -45,369,853 | -771,287,501 |
Here are some more numbers to try:
Try the factor calculator