21780608

素因数分解:

$2^7\times {\mathrm{263}}^1\times {\mathrm{647}}^1$

素因数の和:924

約数の個数: 32

約数和(自身を含む): 43623360

約数和(自身を除く): 21842752

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 263, 526, 647, 1052, 1294, 2104, 2588, 4208, 5176, 8416, 10352, 16832, 20704, 33664, 41408, 82816, 170161, 340322, 680644, 1361288, 2722576, 5445152, 10890304, 21780608]

約数ペア:

[(1, 21780608), (2, 10890304), (4, 5445152), (8, 2722576), (16, 1361288), (32, 680644), (64, 340322), (128, 170161), (263, 82816), (526, 41408), (647, 33664), (1052, 20704), (1294, 16832), (2104, 10352), (2588, 8416), (4208, 5176)]