20842760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 28146040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 71, 82, 142, 164, 179, 205, 284, 328, 355, 358, 410, 568, 710, 716, 820, 895, 1420, 1432, 1640, 1790, 2840, 2911, 3580, 5822, 7160, 7339, 11644, 12709, 14555, 14678, 23288, 25418, 29110, 29356, 36695, 50836, 58220, 58712, 63545, 73390, 101672, 116440, 127090, 146780, 254180, 293560, 508360, 521069, 1042138, 2084276, 2605345, 4168552, 5210690, 10421380, 20842760]

約数ペア:

[(1, 20842760), (2, 10421380), (4, 5210690), (5, 4168552), (8, 2605345), (10, 2084276), (20, 1042138), (40, 521069), (41, 508360), (71, 293560), (82, 254180), (142, 146780), (164, 127090), (179, 116440), (205, 101672), (284, 73390), (328, 63545), (355, 58712), (358, 58220), (410, 50836), (568, 36695), (710, 29356), (716, 29110), (820, 25418), (895, 23288), (1420, 14678), (1432, 14555), (1640, 12709), (1790, 11644), (2840, 7339), (2911, 7160), (3580, 5822)]