20725040

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{311}}^1$

素因数の和:355

約数の個数: 120

約数和(自身を含む): 59540832

約数和(自身を除く): 38815792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 80, 85, 98, 112, 119, 136, 140, 170, 196, 238, 245, 272, 280, 311, 340, 392, 476, 490, 560, 595, 622, 680, 784, 833, 952, 980, 1190, 1244, 1360, 1555, 1666, 1904, 1960, 2177, 2380, 2488, 3110, 3332, 3920, 4165, 4354, 4760, 4976, 5287, 6220, 6664, 8330, 8708, 9520, 10574, 10885, 12440, 13328, 15239, 16660, 17416, 21148, 21770, 24880, 26435, 30478, 33320, 34832, 37009, 42296, 43540, 52870, 60956, 66640, 74018, 76195, 84592, 87080, 105740, 121912, 148036, 152390, 174160, 185045, 211480, 243824, 259063, 296072, 304780, 370090, 422960, 518126, 592144, 609560, 740180, 1036252, 1219120, 1295315, 1480360, 2072504, 2590630, 2960720, 4145008, 5181260, 10362520, 20725040]

約数ペア:

[(1, 20725040), (2, 10362520), (4, 5181260), (5, 4145008), (7, 2960720), (8, 2590630), (10, 2072504), (14, 1480360), (16, 1295315), (17, 1219120), (20, 1036252), (28, 740180), (34, 609560), (35, 592144), (40, 518126), (49, 422960), (56, 370090), (68, 304780), (70, 296072), (80, 259063), (85, 243824), (98, 211480), (112, 185045), (119, 174160), (136, 152390), (140, 148036), (170, 121912), (196, 105740), (238, 87080), (245, 84592), (272, 76195), (280, 74018), (311, 66640), (340, 60956), (392, 52870), (476, 43540), (490, 42296), (560, 37009), (595, 34832), (622, 33320), (680, 30478), (784, 26435), (833, 24880), (952, 21770), (980, 21148), (1190, 17416), (1244, 16660), (1360, 15239), (1555, 13328), (1666, 12440), (1904, 10885), (1960, 10574), (2177, 9520), (2380, 8708), (2488, 8330), (3110, 6664), (3332, 6220), (3920, 5287), (4165, 4976), (4354, 4760)]