21125936

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2161}}^1$

素因数の和:2229

約数の個数: 40

約数和(自身を含む): 45038784

約数和(自身を除く): 23912848

約数列:

[1, 2, 4, 8, 13, 16, 26, 47, 52, 94, 104, 188, 208, 376, 611, 752, 1222, 2161, 2444, 4322, 4888, 8644, 9776, 17288, 28093, 34576, 56186, 101567, 112372, 203134, 224744, 406268, 449488, 812536, 1320371, 1625072, 2640742, 5281484, 10562968, 21125936]

約数ペア:

[(1, 21125936), (2, 10562968), (4, 5281484), (8, 2640742), (13, 1625072), (16, 1320371), (26, 812536), (47, 449488), (52, 406268), (94, 224744), (104, 203134), (188, 112372), (208, 101567), (376, 56186), (611, 34576), (752, 28093), (1222, 17288), (2161, 9776), (2444, 8644), (4322, 4888)]