21378214

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4397}}^1$

素因数の和:4440

約数の個数: 32

約数和(自身を含む): 39898656

約数和(自身を除く): 18520442

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 143, 187, 221, 286, 374, 442, 2431, 4397, 4862, 8794, 48367, 57161, 74749, 96734, 114322, 149498, 628771, 822239, 971737, 1257542, 1644478, 1943474, 10689107, 21378214]

約数ペア:

[(1, 21378214), (2, 10689107), (11, 1943474), (13, 1644478), (17, 1257542), (22, 971737), (26, 822239), (34, 628771), (143, 149498), (187, 114322), (221, 96734), (286, 74749), (374, 57161), (442, 48367), (2431, 8794), (4397, 4862)]