How many factors of are greater than 1000000?
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We can rewrite 7 9 9 9 9 = 7 × 7 × . . . × 7 × 7 (9999 times).
As all of the prime factors are 7, the factors are 1 , 7 , 7 2 , 7 3 , . . . 7 9 9 9 8 , 7 9 9 9 9 .
We can obviously exclude 1 , leaving us with 9 9 9 9 factors.
The number of factors that are greater than the number = 9 9 9 9 − The number of factors that are less than or equal to the number.
We find that 7 7 < 1 0 0 0 0 0 0 and 7 8 > 1 0 0 0 0 0 0
Therefore: The number of factors that are greater than the number = 9 9 9 9 − 7 = 9 9 9 2