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Search: id:A033854
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| A033854 |
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Numbers n such that j(n)*ud(n)=phi(n), j(n) = A033831, ud(n) = number of unitary divisors of n (A034444). |
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1
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| 3, 4, 8, 15, 20, 28, 40, 102, 132, 140, 252, 360, 510, 780
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