Aliquot Sequence/Examples/138

Example of Aliquot Sequence

The aliquot sequence that starts at $138$ reaches as high as $179 \, 931 \, 895 \, 322$ after $117$ steps, then terminates at $1$ after a total of $177$ steps.


Historical Note

The fate of the aliquot sequence that starts at $138$ was determined by Derrick Norman Lehmer.


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $276$
  • 1994: Richard K. Guy: Unsolved Problems in Number Theory (2nd ed.)
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $276$
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