39131721

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:366

約数の個数: 32

約数和(自身を含む): 59616000

約数和(自身を除く): 20484279

約数列:

[1, 3, 9, 27, 71, 137, 149, 213, 411, 447, 639, 1233, 1341, 1917, 3699, 4023, 9727, 10579, 20413, 29181, 31737, 61239, 87543, 95211, 183717, 262629, 285633, 551151, 1449323, 4347969, 13043907, 39131721]

約数ペア:

[(1, 39131721), (3, 13043907), (9, 4347969), (27, 1449323), (71, 551151), (137, 285633), (149, 262629), (213, 183717), (411, 95211), (447, 87543), (639, 61239), (1233, 31737), (1341, 29181), (1917, 20413), (3699, 10579), (4023, 9727)]