20390120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12433}}^1$

素因数の和:12485

約数の個数: 32

約数和(自身を含む): 47000520

約数和(自身を除く): 26610400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12433, 24866, 49732, 62165, 99464, 124330, 248660, 497320, 509753, 1019506, 2039012, 2548765, 4078024, 5097530, 10195060, 20390120]

約数ペア:

[(1, 20390120), (2, 10195060), (4, 5097530), (5, 4078024), (8, 2548765), (10, 2039012), (20, 1019506), (40, 509753), (41, 497320), (82, 248660), (164, 124330), (205, 99464), (328, 62165), (410, 49732), (820, 24866), (1640, 12433)]