20994558

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:329

約数の個数: 64

約数和(自身を含む): 48771072

約数和(自身を除く): 27776514

約数列:

[1, 2, 3, 6, 13, 17, 26, 34, 39, 51, 71, 78, 102, 142, 213, 221, 223, 426, 442, 446, 663, 669, 923, 1207, 1326, 1338, 1846, 2414, 2769, 2899, 3621, 3791, 5538, 5798, 7242, 7582, 8697, 11373, 15691, 15833, 17394, 22746, 31382, 31666, 47073, 47499, 49283, 94146, 94998, 98566, 147849, 205829, 269161, 295698, 411658, 538322, 617487, 807483, 1234974, 1614966, 3499093, 6998186, 10497279, 20994558]

約数ペア:

[(1, 20994558), (2, 10497279), (3, 6998186), (6, 3499093), (13, 1614966), (17, 1234974), (26, 807483), (34, 617487), (39, 538322), (51, 411658), (71, 295698), (78, 269161), (102, 205829), (142, 147849), (213, 98566), (221, 94998), (223, 94146), (426, 49283), (442, 47499), (446, 47073), (663, 31666), (669, 31382), (923, 22746), (1207, 17394), (1326, 15833), (1338, 15691), (1846, 11373), (2414, 8697), (2769, 7582), (2899, 7242), (3621, 5798), (3791, 5538)]