21505029

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2129}}^1$

素因数の和:2189

約数の個数: 32

約数和(自身を含む): 36261120

約数和(自身を除く): 14756091

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 2129, 3367, 6387, 10101, 14903, 27677, 44709, 78773, 83031, 193739, 236319, 551411, 581217, 1024049, 1654233, 3072147, 7168343, 21505029]

約数ペア:

[(1, 21505029), (3, 7168343), (7, 3072147), (13, 1654233), (21, 1024049), (37, 581217), (39, 551411), (91, 236319), (111, 193739), (259, 83031), (273, 78773), (481, 44709), (777, 27677), (1443, 14903), (2129, 10101), (3367, 6387)]