18789687

素因数分解:

$3^2\times 7^2\times {\mathrm{137}}^1\times {\mathrm{311}}^1$

素因数の和:468

約数の個数: 36

約数和(自身を含む): 31904496

約数和(自身を除く): 13114809

約数列:

[1, 3, 7, 9, 21, 49, 63, 137, 147, 311, 411, 441, 933, 959, 1233, 2177, 2799, 2877, 6531, 6713, 8631, 15239, 19593, 20139, 42607, 45717, 60417, 127821, 137151, 298249, 383463, 894747, 2087743, 2684241, 6263229, 18789687]

約数ペア:

[(1, 18789687), (3, 6263229), (7, 2684241), (9, 2087743), (21, 894747), (49, 383463), (63, 298249), (137, 137151), (147, 127821), (311, 60417), (411, 45717), (441, 42607), (933, 20139), (959, 19593), (1233, 15239), (2177, 8631), (2799, 6713), (2877, 6531)]