18718947

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:460

約数の個数: 36

約数和(自身を含む): 30298944

約数和(自身を除く): 11579997

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 169, 279, 397, 403, 507, 1191, 1209, 1521, 3573, 3627, 5161, 5239, 12307, 15483, 15717, 36921, 46449, 47151, 67093, 110763, 159991, 201279, 479973, 603837, 1439919, 2079883, 6239649, 18718947]

約数ペア:

[(1, 18718947), (3, 6239649), (9, 2079883), (13, 1439919), (31, 603837), (39, 479973), (93, 201279), (117, 159991), (169, 110763), (279, 67093), (397, 47151), (403, 46449), (507, 36921), (1191, 15717), (1209, 15483), (1521, 12307), (3573, 5239), (3627, 5161)]