19991895

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{911}}^1$

素因数の和:956

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 22033065

約数列:

[1, 3, 5, 7, 11, 15, 19, 21, 33, 35, 55, 57, 77, 95, 105, 133, 165, 209, 231, 285, 385, 399, 627, 665, 911, 1045, 1155, 1463, 1995, 2733, 3135, 4389, 4555, 6377, 7315, 10021, 13665, 17309, 19131, 21945, 30063, 31885, 50105, 51927, 70147, 86545, 95655, 121163, 150315, 190399, 210441, 259635, 350735, 363489, 571197, 605815, 951995, 1052205, 1332793, 1817445, 2855985, 3998379, 6663965, 19991895]

約数ペア:

[(1, 19991895), (3, 6663965), (5, 3998379), (7, 2855985), (11, 1817445), (15, 1332793), (19, 1052205), (21, 951995), (33, 605815), (35, 571197), (55, 363489), (57, 350735), (77, 259635), (95, 210441), (105, 190399), (133, 150315), (165, 121163), (209, 95655), (231, 86545), (285, 70147), (385, 51927), (399, 50105), (627, 31885), (665, 30063), (911, 21945), (1045, 19131), (1155, 17309), (1463, 13665), (1995, 10021), (2733, 7315), (3135, 6377), (4389, 4555)]