P668
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Square Root Smooth Numbers

ℹ️Published on Saturday, 4th May 2019, 07:00 pm; Solved by 1173;
Difficulty rating: 20%

A positive integer is called square root smooth if all of its prime factors are strictly less than its square root.
Including the number 1, there are 29 square root smooth numbers not exceeding 100.

How many square root smooth numbers are there not exceeding 10000000000?



Soluzione

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