A:
Positive:
1 x 771427455 x 1542854947 x 1641335235 x 328267463 x 166615709 x 1088052315 x 333233545 x 21761
Negative:
-1 x -77142745-5 x -15428549-47 x -1641335-235 x -328267-463 x -166615-709 x -108805-2315 x -33323-3545 x -21761
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 77,142,745, 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 | 77,142,745 | |
| -1 | -77,142,745 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,142,745.
Example:
1 x 77,142,745 = 77,142,745
and
-1 x -77,142,745 = 77,142,745
Notice both answers equal 77,142,745
With that explanation out of the way, let's continue. Next, we take the number 77,142,745 and divide it by 2:
77,142,745 ÷ 2 = 38,571,372.5
If the quotient is a whole number, then 2 and 38,571,372.5 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 | 77,142,745 | |
| -1 | -77,142,745 |
Now, we try dividing 77,142,745 by 3:
77,142,745 ÷ 3 = 25,714,248.3333
If the quotient is a whole number, then 3 and 25,714,248.3333 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 | 77,142,745 | |
| -1 | -77,142,745 |
Let's try dividing by 4:
77,142,745 ÷ 4 = 19,285,686.25
If the quotient is a whole number, then 4 and 19,285,686.25 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 | 77,142,745 | |
| -1 | 77,142,745 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 235 | 463 | 709 | 2,315 | 3,545 | 21,761 | 33,323 | 108,805 | 166,615 | 328,267 | 1,641,335 | 15,428,549 | 77,142,745 |
| -1 | -5 | -47 | -235 | -463 | -709 | -2,315 | -3,545 | -21,761 | -33,323 | -108,805 | -166,615 | -328,267 | -1,641,335 | -15,428,549 | -77,142,745 |
Here are some more numbers to try:
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