18940473

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:459

約数の個数: 40

約数和(自身を含む): 30821120

約数和(自身を除く): 11880647

約数列:

[1, 3, 9, 19, 27, 31, 57, 81, 93, 171, 279, 397, 513, 589, 837, 1191, 1539, 1767, 2511, 3573, 5301, 7543, 10719, 12307, 15903, 22629, 32157, 36921, 47709, 67887, 110763, 203661, 233833, 332289, 610983, 701499, 996867, 2104497, 6313491, 18940473]

約数ペア:

[(1, 18940473), (3, 6313491), (9, 2104497), (19, 996867), (27, 701499), (31, 610983), (57, 332289), (81, 233833), (93, 203661), (171, 110763), (279, 67887), (397, 47709), (513, 36921), (589, 32157), (837, 22629), (1191, 15903), (1539, 12307), (1767, 10719), (2511, 7543), (3573, 5301)]