diff options
| author | mzuenni <michi.zuendorf@gmail.com> | 2022-06-27 17:19:28 +0200 |
|---|---|---|
| committer | mzuenni <michi.zuendorf@gmail.com> | 2022-06-27 17:19:28 +0200 |
| commit | 5ab8a5088b729a9953b8dff1b2a985dc8fb2098b (patch) | |
| tree | ed40d6936c0e9eee40ba62751cbf99ecddbaddc2 /math/divisors.cpp | |
| parent | adabbad9c51cf7cd3874bfde8eac1fbcf84fec10 (diff) | |
updated tcr
Diffstat (limited to 'math/divisors.cpp')
| -rw-r--r-- | math/divisors.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/math/divisors.cpp b/math/divisors.cpp new file mode 100644 index 0000000..638c87c --- /dev/null +++ b/math/divisors.cpp @@ -0,0 +1,11 @@ +ll countDivisors(ll n) { + ll res = 1; + for (ll i = 2; i * i * i <= n; i++) { + ll c = 0; + while (n % i == 0) {n /= i; c++;} + res *= c + 1; + } + if (isPrime(n)) res *= 2; + else if (n > 1) res *= isSquare(n) ? 3 : 4; + return res; +}
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