17901994

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:366

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 12579926

約数列:

[1, 2, 11, 22, 41, 82, 89, 178, 223, 446, 451, 902, 979, 1958, 2453, 3649, 4906, 7298, 9143, 18286, 19847, 39694, 40139, 80278, 100573, 201146, 218317, 436634, 813727, 1627454, 8950997, 17901994]

約数ペア:

[(1, 17901994), (2, 8950997), (11, 1627454), (22, 813727), (41, 436634), (82, 218317), (89, 201146), (178, 100573), (223, 80278), (446, 40139), (451, 39694), (902, 19847), (979, 18286), (1958, 9143), (2453, 7298), (3649, 4906)]