18637983

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3251}}^1$

素因数の和:3284

約数の個数: 36

約数和(自身を含む): 33736248

約数和(自身を除く): 15098265

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3251, 5733, 9753, 22757, 29259, 42263, 68271, 126789, 159299, 204813, 295841, 380367, 477897, 887523, 1433691, 2070887, 2662569, 6212661, 18637983]

約数ペア:

[(1, 18637983), (3, 6212661), (7, 2662569), (9, 2070887), (13, 1433691), (21, 887523), (39, 477897), (49, 380367), (63, 295841), (91, 204813), (117, 159299), (147, 126789), (273, 68271), (441, 42263), (637, 29259), (819, 22757), (1911, 9753), (3251, 5733)]