19943660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{269}}^1\times {\mathrm{337}}^1$

素因数の和:626

約数の個数: 48

約数和(自身を含む): 45995040

約数和(自身を除く): 26051380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 269, 337, 538, 674, 1076, 1345, 1348, 1685, 2690, 2959, 3370, 3707, 5380, 5918, 6740, 7414, 11836, 14795, 14828, 18535, 29590, 37070, 59180, 74140, 90653, 181306, 362612, 453265, 906530, 997183, 1813060, 1994366, 3988732, 4985915, 9971830, 19943660]

約数ペア:

[(1, 19943660), (2, 9971830), (4, 4985915), (5, 3988732), (10, 1994366), (11, 1813060), (20, 997183), (22, 906530), (44, 453265), (55, 362612), (110, 181306), (220, 90653), (269, 74140), (337, 59180), (538, 37070), (674, 29590), (1076, 18535), (1345, 14828), (1348, 14795), (1685, 11836), (2690, 7414), (2959, 6740), (3370, 5918), (3707, 5380)]