A:
Positive:
1 x 720416417 x 1029166343 x 167538771 x 1014671301 x 239341497 x 1449533053 x 235973371 x 21371
Negative:
-1 x -72041641-7 x -10291663-43 x -1675387-71 x -1014671-301 x -239341-497 x -144953-3053 x -23597-3371 x -21371
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 72,041,641, 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 | 72,041,641 | |
| -1 | -72,041,641 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,041,641.
Example:
1 x 72,041,641 = 72,041,641
and
-1 x -72,041,641 = 72,041,641
Notice both answers equal 72,041,641
With that explanation out of the way, let's continue. Next, we take the number 72,041,641 and divide it by 2:
72,041,641 ÷ 2 = 36,020,820.5
If the quotient is a whole number, then 2 and 36,020,820.5 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 | 72,041,641 | |
| -1 | -72,041,641 |
Now, we try dividing 72,041,641 by 3:
72,041,641 ÷ 3 = 24,013,880.3333
If the quotient is a whole number, then 3 and 24,013,880.3333 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 | 72,041,641 | |
| -1 | -72,041,641 |
Let's try dividing by 4:
72,041,641 ÷ 4 = 18,010,410.25
If the quotient is a whole number, then 4 and 18,010,410.25 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 | 72,041,641 | |
| -1 | 72,041,641 |
If you did it right, you will end up with this table:
| 1 | 7 | 43 | 71 | 301 | 497 | 3,053 | 3,371 | 21,371 | 23,597 | 144,953 | 239,341 | 1,014,671 | 1,675,387 | 10,291,663 | 72,041,641 |
| -1 | -7 | -43 | -71 | -301 | -497 | -3,053 | -3,371 | -21,371 | -23,597 | -144,953 | -239,341 | -1,014,671 | -1,675,387 | -10,291,663 | -72,041,641 |
Here are some more numbers to try:
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