81709628

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{20407}}^1$

素因数の和:20442

約数の個数: 48

約数和(自身を含む): 191998464

約数和(自身を除く): 110288836

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 20407, 40814, 81628, 142849, 224477, 265291, 285698, 448954, 530582, 571396, 897908, 1061164, 1571339, 1857037, 2918201, 3142678, 3714074, 5836402, 6285356, 7428148, 11672804, 20427407, 40854814, 81709628]

約数ペア:

[(1, 81709628), (2, 40854814), (4, 20427407), (7, 11672804), (11, 7428148), (13, 6285356), (14, 5836402), (22, 3714074), (26, 3142678), (28, 2918201), (44, 1857037), (52, 1571339), (77, 1061164), (91, 897908), (143, 571396), (154, 530582), (182, 448954), (286, 285698), (308, 265291), (364, 224477), (572, 142849), (1001, 81628), (2002, 40814), (4004, 20407)]