21185080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2609}}^1$

素因数の和:2656

約数の個数: 64

約数和(自身を含む): 56376000

約数和(自身を除く): 35190920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2609, 4060, 5218, 8120, 10436, 13045, 18263, 20872, 26090, 36526, 52180, 73052, 75661, 91315, 104360, 146104, 151322, 182630, 302644, 365260, 378305, 529627, 605288, 730520, 756610, 1059254, 1513220, 2118508, 2648135, 3026440, 4237016, 5296270, 10592540, 21185080]

約数ペア:

[(1, 21185080), (2, 10592540), (4, 5296270), (5, 4237016), (7, 3026440), (8, 2648135), (10, 2118508), (14, 1513220), (20, 1059254), (28, 756610), (29, 730520), (35, 605288), (40, 529627), (56, 378305), (58, 365260), (70, 302644), (116, 182630), (140, 151322), (145, 146104), (203, 104360), (232, 91315), (280, 75661), (290, 73052), (406, 52180), (580, 36526), (812, 26090), (1015, 20872), (1160, 18263), (1624, 13045), (2030, 10436), (2609, 8120), (4060, 5218)]