20489217

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{449}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 12169983

約数列:

[1, 3, 7, 21, 41, 53, 123, 159, 287, 371, 449, 861, 1113, 1347, 2173, 3143, 6519, 9429, 15211, 18409, 23797, 45633, 55227, 71391, 128863, 166579, 386589, 499737, 975677, 2927031, 6829739, 20489217]

約数ペア:

[(1, 20489217), (3, 6829739), (7, 2927031), (21, 975677), (41, 499737), (53, 386589), (123, 166579), (159, 128863), (287, 71391), (371, 55227), (449, 45633), (861, 23797), (1113, 18409), (1347, 15211), (2173, 9429), (3143, 6519)]