81404120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{947}}^1$

素因数の和:1272

約数の個数: 64

約数和(自身を含む): 210228480

約数和(自身を除く): 128824360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 307, 614, 947, 1228, 1535, 1894, 2149, 2456, 3070, 3788, 4298, 4735, 6140, 6629, 7576, 8596, 9470, 10745, 12280, 13258, 17192, 18940, 21490, 26516, 33145, 37880, 42980, 53032, 66290, 85960, 132580, 265160, 290729, 581458, 1162916, 1453645, 2035103, 2325832, 2907290, 4070206, 5814580, 8140412, 10175515, 11629160, 16280824, 20351030, 40702060, 81404120]

約数ペア:

[(1, 81404120), (2, 40702060), (4, 20351030), (5, 16280824), (7, 11629160), (8, 10175515), (10, 8140412), (14, 5814580), (20, 4070206), (28, 2907290), (35, 2325832), (40, 2035103), (56, 1453645), (70, 1162916), (140, 581458), (280, 290729), (307, 265160), (614, 132580), (947, 85960), (1228, 66290), (1535, 53032), (1894, 42980), (2149, 37880), (2456, 33145), (3070, 26516), (3788, 21490), (4298, 18940), (4735, 17192), (6140, 13258), (6629, 12280), (7576, 10745), (8596, 9470)]