20487159

Appears in sequences

• Odd numbers n such that abs(sigma(n)-2n) <= n^(1/3). Abundance-radius = abs(sigma(n)-2n) does not exceed cubic root of n and n is odd.at n=24A088010
• Odd numbers whose abundancy is closer to 2 than any smaller odd number.at n=19A171929
• Odd abundant numbers whose abundancy is closer to 2 than any smaller odd abundant number.at n=11A188263
• Numbers k whose abundance is 18: sigma(k) - 2*k = 18.at n=6A223610
• Numbers k such that sigma(k) == 0 (mod k+9).at n=7A274563