81805108

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2045

約数の個数: 72

約数和(自身を含む): 191328480

約数和(自身を除く): 109523372

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 49, 76, 77, 98, 133, 154, 196, 209, 266, 308, 418, 532, 539, 836, 931, 1078, 1463, 1862, 1997, 2156, 2926, 3724, 3994, 5852, 7988, 10241, 13979, 20482, 21967, 27958, 37943, 40964, 43934, 55916, 75886, 87868, 97853, 151772, 153769, 195706, 265601, 307538, 391412, 417373, 531202, 615076, 834746, 1062404, 1076383, 1669492, 1859207, 2152766, 2921611, 3718414, 4305532, 5843222, 7436828, 11686444, 20451277, 40902554, 81805108]

約数ペア:

[(1, 81805108), (2, 40902554), (4, 20451277), (7, 11686444), (11, 7436828), (14, 5843222), (19, 4305532), (22, 3718414), (28, 2921611), (38, 2152766), (44, 1859207), (49, 1669492), (76, 1076383), (77, 1062404), (98, 834746), (133, 615076), (154, 531202), (196, 417373), (209, 391412), (266, 307538), (308, 265601), (418, 195706), (532, 153769), (539, 151772), (836, 97853), (931, 87868), (1078, 75886), (1463, 55916), (1862, 43934), (1997, 40964), (2156, 37943), (2926, 27958), (3724, 21967), (3994, 20482), (5852, 13979), (7988, 10241)]