17945960

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^2\times {\mathrm{89}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 41415300

約数和(自身を除く): 23469340

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 142, 178, 284, 355, 356, 445, 568, 710, 712, 890, 1420, 1780, 2840, 3560, 5041, 6319, 10082, 12638, 20164, 25205, 25276, 31595, 40328, 50410, 50552, 63190, 100820, 126380, 201640, 252760, 448649, 897298, 1794596, 2243245, 3589192, 4486490, 8972980, 17945960]

約数ペア:

[(1, 17945960), (2, 8972980), (4, 4486490), (5, 3589192), (8, 2243245), (10, 1794596), (20, 897298), (40, 448649), (71, 252760), (89, 201640), (142, 126380), (178, 100820), (284, 63190), (355, 50552), (356, 50410), (445, 40328), (568, 31595), (710, 25276), (712, 25205), (890, 20164), (1420, 12638), (1780, 10082), (2840, 6319), (3560, 5041)]