20807841640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{265813}}^1$

素因数の和:265946

約数の個数: 64

約数和(自身を含む): 49760380800

約数和(自身を除く): 28952539160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 103, 152, 190, 206, 380, 412, 515, 760, 824, 1030, 1957, 2060, 3914, 4120, 7828, 9785, 15656, 19570, 39140, 78280, 265813, 531626, 1063252, 1329065, 2126504, 2658130, 5050447, 5316260, 10100894, 10632520, 20201788, 25252235, 27378739, 40403576, 50504470, 54757478, 101008940, 109514956, 136893695, 202017880, 219029912, 273787390, 520196041, 547574780, 1040392082, 1095149560, 2080784164, 2600980205, 4161568328, 5201960410, 10403920820, 20807841640]

約数ペア:

[(1, 20807841640), (2, 10403920820), (4, 5201960410), (5, 4161568328), (8, 2600980205), (10, 2080784164), (19, 1095149560), (20, 1040392082), (38, 547574780), (40, 520196041), (76, 273787390), (95, 219029912), (103, 202017880), (152, 136893695), (190, 109514956), (206, 101008940), (380, 54757478), (412, 50504470), (515, 40403576), (760, 27378739), (824, 25252235), (1030, 20201788), (1957, 10632520), (2060, 10100894), (3914, 5316260), (4120, 5050447), (7828, 2658130), (9785, 2126504), (15656, 1329065), (19570, 1063252), (39140, 531626), (78280, 265813)]