21305835

素因数分解:

$3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1697}}^1$

素因数の和:1745

約数の個数: 40

約数和(自身を含む): 39447936

約数和(自身を除く): 18142101

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 81, 93, 135, 155, 279, 405, 465, 837, 1395, 1697, 2511, 4185, 5091, 8485, 12555, 15273, 25455, 45819, 52607, 76365, 137457, 157821, 229095, 263035, 473463, 687285, 789105, 1420389, 2367315, 4261167, 7101945, 21305835]

約数ペア:

[(1, 21305835), (3, 7101945), (5, 4261167), (9, 2367315), (15, 1420389), (27, 789105), (31, 687285), (45, 473463), (81, 263035), (93, 229095), (135, 157821), (155, 137457), (279, 76365), (405, 52607), (465, 45819), (837, 25455), (1395, 15273), (1697, 12555), (2511, 8485), (4185, 5091)]