A:
Positive:
1 x 778614555 x 155722917 x 1112306535 x 2224613251 x 3102051255 x 620411757 x 443158785 x 8863
Negative:
-1 x -77861455-5 x -15572291-7 x -11123065-35 x -2224613-251 x -310205-1255 x -62041-1757 x -44315-8785 x -8863
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 77,861,455, 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 | 77,861,455 | |
| -1 | -77,861,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,861,455.
Example:
1 x 77,861,455 = 77,861,455
and
-1 x -77,861,455 = 77,861,455
Notice both answers equal 77,861,455
With that explanation out of the way, let's continue. Next, we take the number 77,861,455 and divide it by 2:
77,861,455 ÷ 2 = 38,930,727.5
If the quotient is a whole number, then 2 and 38,930,727.5 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 | 77,861,455 | |
| -1 | -77,861,455 |
Now, we try dividing 77,861,455 by 3:
77,861,455 ÷ 3 = 25,953,818.3333
If the quotient is a whole number, then 3 and 25,953,818.3333 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 | 77,861,455 | |
| -1 | -77,861,455 |
Let's try dividing by 4:
77,861,455 ÷ 4 = 19,465,363.75
If the quotient is a whole number, then 4 and 19,465,363.75 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 | 77,861,455 | |
| -1 | 77,861,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 251 | 1,255 | 1,757 | 8,785 | 8,863 | 44,315 | 62,041 | 310,205 | 2,224,613 | 11,123,065 | 15,572,291 | 77,861,455 |
| -1 | -5 | -7 | -35 | -251 | -1,255 | -1,757 | -8,785 | -8,863 | -44,315 | -62,041 | -310,205 | -2,224,613 | -11,123,065 | -15,572,291 | -77,861,455 |
Here are some more numbers to try:
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