20958440

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5087}}^1$

素因数の和:5201

約数の個数: 32

約数和(自身を含む): 47623680

約数和(自身を除く): 26665240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5087, 10174, 20348, 25435, 40696, 50870, 101740, 203480, 523961, 1047922, 2095844, 2619805, 4191688, 5239610, 10479220, 20958440]

約数ペア:

[(1, 20958440), (2, 10479220), (4, 5239610), (5, 4191688), (8, 2619805), (10, 2095844), (20, 1047922), (40, 523961), (103, 203480), (206, 101740), (412, 50870), (515, 40696), (824, 25435), (1030, 20348), (2060, 10174), (4120, 5087)]