A:
Positive:
1 x 7023187917 x 413128767 x 1048237197 x 356507313 x 2243831139 x 616613349 x 209715321 x 13199
Negative:
-1 x -70231879-17 x -4131287-67 x -1048237-197 x -356507-313 x -224383-1139 x -61661-3349 x -20971-5321 x -13199
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 70,231,879, 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 | 70,231,879 | |
| -1 | -70,231,879 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 70,231,879.
Example:
1 x 70,231,879 = 70,231,879
and
-1 x -70,231,879 = 70,231,879
Notice both answers equal 70,231,879
With that explanation out of the way, let's continue. Next, we take the number 70,231,879 and divide it by 2:
70,231,879 ÷ 2 = 35,115,939.5
If the quotient is a whole number, then 2 and 35,115,939.5 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 | 70,231,879 | |
| -1 | -70,231,879 |
Now, we try dividing 70,231,879 by 3:
70,231,879 ÷ 3 = 23,410,626.3333
If the quotient is a whole number, then 3 and 23,410,626.3333 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 | 70,231,879 | |
| -1 | -70,231,879 |
Let's try dividing by 4:
70,231,879 ÷ 4 = 17,557,969.75
If the quotient is a whole number, then 4 and 17,557,969.75 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 | 70,231,879 | |
| -1 | 70,231,879 |
If you did it right, you will end up with this table:
| 1 | 17 | 67 | 197 | 313 | 1,139 | 3,349 | 5,321 | 13,199 | 20,971 | 61,661 | 224,383 | 356,507 | 1,048,237 | 4,131,287 | 70,231,879 |
| -1 | -17 | -67 | -197 | -313 | -1,139 | -3,349 | -5,321 | -13,199 | -20,971 | -61,661 | -224,383 | -356,507 | -1,048,237 | -4,131,287 | -70,231,879 |
Here are some more numbers to try:
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