18117820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1019}}^1$

素因数の和:1162

約数の個数: 48

約数和(自身を含む): 43868160

約数和(自身を除く): 25750340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1019, 1270, 1778, 2038, 2540, 3556, 4076, 4445, 5095, 7133, 8890, 10190, 14266, 17780, 20380, 28532, 35665, 71330, 129413, 142660, 258826, 517652, 647065, 905891, 1294130, 1811782, 2588260, 3623564, 4529455, 9058910, 18117820]

約数ペア:

[(1, 18117820), (2, 9058910), (4, 4529455), (5, 3623564), (7, 2588260), (10, 1811782), (14, 1294130), (20, 905891), (28, 647065), (35, 517652), (70, 258826), (127, 142660), (140, 129413), (254, 71330), (508, 35665), (635, 28532), (889, 20380), (1019, 17780), (1270, 14266), (1778, 10190), (2038, 8890), (2540, 7133), (3556, 5095), (4076, 4445)]