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유니타리 약수 함수 유니타리 약수 함수열 외부 링크 둘러보기 메뉴Unitary Divisor Function - from MathWorld문서를 완성해

수론


수학유니타리 약수약수 함수유니타리 약수제곱합소인수 분해












유니타리 약수 함수




위키백과, 우리 모두의 백과사전.






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수학에서 유니타리 약수 함수(Unitary Divisor function) σk∗(n)displaystyle sigma _k^*(n)은 유니타리 약수에 대한 약수 함수로, n의 유니타리 약수들의 k 제곱 값의 합으로 정의된다. 보통 σ1∗(n)displaystyle sigma _1^*(n)을 줄여서 σ*(n)이라고 쓴다.


만약 n=∏i=1rpiαidisplaystyle n=prod _i=1^rp_i^alpha _i로 소인수 분해 된다면,


σk∗(n)=∏i=1r(1+pikαi)displaystyle sigma _k^*(n)=prod _i=1^r(1+p_i^kalpha _i)

이 성립한다.



유니타리 약수 함수열




















kOEIS
σk∗(n)displaystyle sigma _k^*(n), n=1, 2, 3, ...
0A0344441, 2, 2, 2, 2, 4, 2, 2, 2, 4, 2, 4, ...
1A0344481, 3, 4, 5, 6, 12, 8, 9, 10, 18, 12, 20, ...
2A0346761, 5, 10, 17, 26, 50, 50, 65, 82, 130, 122, 170, ...
3A0346771, 9, 28, 65, 126, 252, 344, 513, 730, 1134, ...
4A0346781, 17, 82, 257, 626, 1394, 2402, 4097, 6562, 10642, ...


외부 링크


  • Unitary Divisor Function - from MathWorld





원본 주소 "https://ko.wikipedia.org/w/index.php?title=유니타리_약수_함수&oldid=19598753"










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