20378201860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{520649}}^1$

素因数の和:520780

約数の個数: 48

約数和(自身を含む): 45483984000

約数和(自身を除く): 25105782140

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 103, 190, 206, 380, 412, 515, 1030, 1957, 2060, 3914, 7828, 9785, 19570, 39140, 520649, 1041298, 2082596, 2603245, 5206490, 9892331, 10412980, 19784662, 39569324, 49461655, 53626847, 98923310, 107253694, 197846620, 214507388, 268134235, 536268470, 1018910093, 1072536940, 2037820186, 4075640372, 5094550465, 10189100930, 20378201860]

約数ペア:

[(1, 20378201860), (2, 10189100930), (4, 5094550465), (5, 4075640372), (10, 2037820186), (19, 1072536940), (20, 1018910093), (38, 536268470), (76, 268134235), (95, 214507388), (103, 197846620), (190, 107253694), (206, 98923310), (380, 53626847), (412, 49461655), (515, 39569324), (1030, 19784662), (1957, 10412980), (2060, 9892331), (3914, 5206490), (7828, 2603245), (9785, 2082596), (19570, 1041298), (39140, 520649)]