20099720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{499}}^1$

素因数の和:582

約数の個数: 64

約数和(自身を含む): 48600000

約数和(自身を除く): 28500280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 53, 76, 95, 106, 152, 190, 212, 265, 380, 424, 499, 530, 760, 998, 1007, 1060, 1996, 2014, 2120, 2495, 3992, 4028, 4990, 5035, 8056, 9481, 9980, 10070, 18962, 19960, 20140, 26447, 37924, 40280, 47405, 52894, 75848, 94810, 105788, 132235, 189620, 211576, 264470, 379240, 502493, 528940, 1004986, 1057880, 2009972, 2512465, 4019944, 5024930, 10049860, 20099720]

約数ペア:

[(1, 20099720), (2, 10049860), (4, 5024930), (5, 4019944), (8, 2512465), (10, 2009972), (19, 1057880), (20, 1004986), (38, 528940), (40, 502493), (53, 379240), (76, 264470), (95, 211576), (106, 189620), (152, 132235), (190, 105788), (212, 94810), (265, 75848), (380, 52894), (424, 47405), (499, 40280), (530, 37924), (760, 26447), (998, 20140), (1007, 19960), (1060, 18962), (1996, 10070), (2014, 9980), (2120, 9481), (2495, 8056), (3992, 5035), (4028, 4990)]