2620

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Number

$2620$ (two thousand, six hundred and twenty) is:

$2^2 \times 5 \times 131$

The smaller of the $3$rd amicable pair, with $2924$:

$\map {\sigma_1} {2620} = \map {\sigma_1} {2924} = 5544 = 2620 + 2924$

Arithmetic Functions on $2620$

\(\ds \map {\sigma_1} { 2620 }\)

\(=\)

\(\ds 5544\)

$\sigma_1$ of $2620$

Also see

• Previous  ... Next: Amicable Pair

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $2620$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $2620$