20547560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:147

約数の個数: 128

約数和(自身を含む): 55520640

約数和(自身を除く): 34973080

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 41, 44, 55, 67, 68, 82, 85, 88, 110, 134, 136, 164, 170, 187, 205, 220, 268, 328, 335, 340, 374, 410, 440, 451, 536, 670, 680, 697, 737, 748, 820, 902, 935, 1139, 1340, 1394, 1474, 1496, 1640, 1804, 1870, 2255, 2278, 2680, 2747, 2788, 2948, 3485, 3608, 3685, 3740, 4510, 4556, 5494, 5576, 5695, 5896, 6970, 7370, 7480, 7667, 9020, 9112, 10988, 11390, 12529, 13735, 13940, 14740, 15334, 18040, 21976, 22780, 25058, 27470, 27880, 29480, 30217, 30668, 38335, 45560, 46699, 50116, 54940, 60434, 61336, 62645, 76670, 93398, 100232, 109880, 120868, 125290, 151085, 153340, 186796, 233495, 241736, 250580, 302170, 306680, 373592, 466990, 501160, 513689, 604340, 933980, 1027378, 1208680, 1867960, 2054756, 2568445, 4109512, 5136890, 10273780, 20547560]

約数ペア:

[(1, 20547560), (2, 10273780), (4, 5136890), (5, 4109512), (8, 2568445), (10, 2054756), (11, 1867960), (17, 1208680), (20, 1027378), (22, 933980), (34, 604340), (40, 513689), (41, 501160), (44, 466990), (55, 373592), (67, 306680), (68, 302170), (82, 250580), (85, 241736), (88, 233495), (110, 186796), (134, 153340), (136, 151085), (164, 125290), (170, 120868), (187, 109880), (205, 100232), (220, 93398), (268, 76670), (328, 62645), (335, 61336), (340, 60434), (374, 54940), (410, 50116), (440, 46699), (451, 45560), (536, 38335), (670, 30668), (680, 30217), (697, 29480), (737, 27880), (748, 27470), (820, 25058), (902, 22780), (935, 21976), (1139, 18040), (1340, 15334), (1394, 14740), (1474, 13940), (1496, 13735), (1640, 12529), (1804, 11390), (1870, 10988), (2255, 9112), (2278, 9020), (2680, 7667), (2747, 7480), (2788, 7370), (2948, 6970), (3485, 5896), (3608, 5695), (3685, 5576), (3740, 5494), (4510, 4556)]