20921180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5153}}^1$

素因数の和:5198

約数の個数: 48

約数和(自身を含む): 51952320

約数和(自身を除く): 31031140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5153, 10306, 20612, 25765, 36071, 51530, 72142, 103060, 144284, 149437, 180355, 298874, 360710, 597748, 721420, 747185, 1046059, 1494370, 2092118, 2988740, 4184236, 5230295, 10460590, 20921180]

約数ペア:

[(1, 20921180), (2, 10460590), (4, 5230295), (5, 4184236), (7, 2988740), (10, 2092118), (14, 1494370), (20, 1046059), (28, 747185), (29, 721420), (35, 597748), (58, 360710), (70, 298874), (116, 180355), (140, 149437), (145, 144284), (203, 103060), (290, 72142), (406, 51530), (580, 36071), (812, 25765), (1015, 20612), (2030, 10306), (4060, 5153)]