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Chowla numbers: Difference between revisions
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changed the appearance of an apparent unary (negative) operator.
m (changed the appearance of an apparent unary (negative) operator.) |
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Chowla numbers can also be expressed as:
chowla(<big>'''n'''</big>) = sum of divisors of <big>'''n'''</big> excluding unity and <big>'''n'''</big>
chowla(<big>'''n'''</big>) = sum( divisors(<big>'''n'''</big>)) <big>'''- 1 - n''' </big>
chowla(<big>'''n'''</big>) = sum( properDivisors(<big>'''n'''</big>)) <big>'''- 1''' </big>
chowla(<big>'''n'''</big>) = sum(aliquotDivisors(<big>'''n'''</big>)) <big>'''- 1''' </big>
chowla(<big>'''n'''</big>) = aliquot(<big>'''n'''</big>) <big>'''- 1''' </big>
chowla(<big>'''n'''</big>) = sigma(<big>'''n'''</big>) <big>'''- 1 - n''' </big>
chowla(<big>'''n'''</big>) = sigmaProperDivisiors(<big>'''n'''</big>) <big>'''- 1''' </big>
chowla(<big>'''a'''*'''b'''</big>) = <big>'''a''' + '''b'''</big>, ''if'' <big>'''a'''</big> and <big>'''b'''</big> are distinct primes
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