Definition:Highly Composite Number/Mistake

Source Work

1986: David Wells: Curious and Interesting Numbers:

The Dictionary

$60$

1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary

$60$

Mistake

[$60$ is] the $8$th 'highly composite' number, defined by Ramanujan as a number that, counting from $1$, sets a record for the number of its divisors ... The sequence of 'highly composite' numbers starts: $2 \quad 4 \quad 6 \quad 12 \quad 24 \ldots$

The sequence properly starts at $1$, as reported in OEIS: A002182, and so $60$ is then the $9$th highly composite number, not the $8$th.

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $60$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $60$