21281008

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11177}}^1$

素因数の和:11209

約数の個数: 40

約数和(自身を含む): 49898592

約数和(自身を除く): 28617584

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 112, 119, 136, 238, 272, 476, 952, 1904, 11177, 22354, 44708, 78239, 89416, 156478, 178832, 190009, 312956, 380018, 625912, 760036, 1251824, 1330063, 1520072, 2660126, 3040144, 5320252, 10640504, 21281008]

約数ペア:

[(1, 21281008), (2, 10640504), (4, 5320252), (7, 3040144), (8, 2660126), (14, 1520072), (16, 1330063), (17, 1251824), (28, 760036), (34, 625912), (56, 380018), (68, 312956), (112, 190009), (119, 178832), (136, 156478), (238, 89416), (272, 78239), (476, 44708), (952, 22354), (1904, 11177)]