20572720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2161}}^1$

素因数の和:2198

約数の個数: 80

約数和(自身を含む): 57907008

約数和(自身を除く): 37334288

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 56, 68, 70, 80, 85, 112, 119, 136, 140, 170, 238, 272, 280, 340, 476, 560, 595, 680, 952, 1190, 1360, 1904, 2161, 2380, 4322, 4760, 8644, 9520, 10805, 15127, 17288, 21610, 30254, 34576, 36737, 43220, 60508, 73474, 75635, 86440, 121016, 146948, 151270, 172880, 183685, 242032, 257159, 293896, 302540, 367370, 514318, 587792, 605080, 734740, 1028636, 1210160, 1285795, 1469480, 2057272, 2571590, 2938960, 4114544, 5143180, 10286360, 20572720]

約数ペア:

[(1, 20572720), (2, 10286360), (4, 5143180), (5, 4114544), (7, 2938960), (8, 2571590), (10, 2057272), (14, 1469480), (16, 1285795), (17, 1210160), (20, 1028636), (28, 734740), (34, 605080), (35, 587792), (40, 514318), (56, 367370), (68, 302540), (70, 293896), (80, 257159), (85, 242032), (112, 183685), (119, 172880), (136, 151270), (140, 146948), (170, 121016), (238, 86440), (272, 75635), (280, 73474), (340, 60508), (476, 43220), (560, 36737), (595, 34576), (680, 30254), (952, 21610), (1190, 17288), (1360, 15127), (1904, 10805), (2161, 9520), (2380, 8644), (4322, 4760)]