A:
Positive:
1 x 7717167711 x 701560737 x 2085721127 x 607651407 x 1896111397 x 552411493 x 516894699 x 16423
Negative:
-1 x -77171677-11 x -7015607-37 x -2085721-127 x -607651-407 x -189611-1397 x -55241-1493 x -51689-4699 x -16423
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 77,171,677, 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 | 77,171,677 | |
| -1 | -77,171,677 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,171,677.
Example:
1 x 77,171,677 = 77,171,677
and
-1 x -77,171,677 = 77,171,677
Notice both answers equal 77,171,677
With that explanation out of the way, let's continue. Next, we take the number 77,171,677 and divide it by 2:
77,171,677 ÷ 2 = 38,585,838.5
If the quotient is a whole number, then 2 and 38,585,838.5 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 | 77,171,677 | |
| -1 | -77,171,677 |
Now, we try dividing 77,171,677 by 3:
77,171,677 ÷ 3 = 25,723,892.3333
If the quotient is a whole number, then 3 and 25,723,892.3333 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 | 77,171,677 | |
| -1 | -77,171,677 |
Let's try dividing by 4:
77,171,677 ÷ 4 = 19,292,919.25
If the quotient is a whole number, then 4 and 19,292,919.25 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 | 77,171,677 | |
| -1 | 77,171,677 |
If you did it right, you will end up with this table:
| 1 | 11 | 37 | 127 | 407 | 1,397 | 1,493 | 4,699 | 16,423 | 51,689 | 55,241 | 189,611 | 607,651 | 2,085,721 | 7,015,607 | 77,171,677 |
| -1 | -11 | -37 | -127 | -407 | -1,397 | -1,493 | -4,699 | -16,423 | -51,689 | -55,241 | -189,611 | -607,651 | -2,085,721 | -7,015,607 | -77,171,677 |
Here are some more numbers to try:
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