20840440

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3803}}^1$

素因数の和:3951

約数の個数: 32

約数和(自身を含む): 47245680

約数和(自身を除く): 26405240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3803, 5480, 7606, 15212, 19015, 30424, 38030, 76060, 152120, 521011, 1042022, 2084044, 2605055, 4168088, 5210110, 10420220, 20840440]

約数ペア:

[(1, 20840440), (2, 10420220), (4, 5210110), (5, 4168088), (8, 2605055), (10, 2084044), (20, 1042022), (40, 521011), (137, 152120), (274, 76060), (548, 38030), (685, 30424), (1096, 19015), (1370, 15212), (2740, 7606), (3803, 5480)]