20197619920

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1031}}^1\times {\mathrm{3449}}^1$

素因数の和:4564

約数の個数: 80

約数和(自身を含む): 47680876800

約数和(自身を除く): 27483256880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1031, 1136, 1420, 2062, 2840, 3449, 4124, 5155, 5680, 6898, 8248, 10310, 13796, 16496, 17245, 20620, 27592, 34490, 41240, 55184, 68980, 73201, 82480, 137960, 146402, 244879, 275920, 292804, 366005, 489758, 585608, 732010, 979516, 1171216, 1224395, 1464020, 1959032, 2448790, 2928040, 3555919, 3918064, 4897580, 5856080, 7111838, 9795160, 14223676, 17779595, 19590320, 28447352, 35559190, 56894704, 71118380, 142236760, 252470249, 284473520, 504940498, 1009880996, 1262351245, 2019761992, 2524702490, 4039523984, 5049404980, 10098809960, 20197619920]

約数ペア:

[(1, 20197619920), (2, 10098809960), (4, 5049404980), (5, 4039523984), (8, 2524702490), (10, 2019761992), (16, 1262351245), (20, 1009880996), (40, 504940498), (71, 284473520), (80, 252470249), (142, 142236760), (284, 71118380), (355, 56894704), (568, 35559190), (710, 28447352), (1031, 19590320), (1136, 17779595), (1420, 14223676), (2062, 9795160), (2840, 7111838), (3449, 5856080), (4124, 4897580), (5155, 3918064), (5680, 3555919), (6898, 2928040), (8248, 2448790), (10310, 1959032), (13796, 1464020), (16496, 1224395), (17245, 1171216), (20620, 979516), (27592, 732010), (34490, 585608), (41240, 489758), (55184, 366005), (68980, 292804), (73201, 275920), (82480, 244879), (137960, 146402)]