20647528

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{233}}^1$

素因数の和:322

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 24842072

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 53, 76, 88, 106, 152, 209, 212, 233, 418, 424, 466, 583, 836, 932, 1007, 1166, 1672, 1864, 2014, 2332, 2563, 4028, 4427, 4664, 5126, 8056, 8854, 10252, 11077, 12349, 17708, 20504, 22154, 24698, 35416, 44308, 48697, 49396, 88616, 97394, 98792, 135839, 194788, 234631, 271678, 389576, 469262, 543356, 938524, 1086712, 1877048, 2580941, 5161882, 10323764, 20647528]

約数ペア:

[(1, 20647528), (2, 10323764), (4, 5161882), (8, 2580941), (11, 1877048), (19, 1086712), (22, 938524), (38, 543356), (44, 469262), (53, 389576), (76, 271678), (88, 234631), (106, 194788), (152, 135839), (209, 98792), (212, 97394), (233, 88616), (418, 49396), (424, 48697), (466, 44308), (583, 35416), (836, 24698), (932, 22154), (1007, 20504), (1166, 17708), (1672, 12349), (1864, 11077), (2014, 10252), (2332, 8854), (2563, 8056), (4028, 5126), (4427, 4664)]