21013263

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{4397}}^1$

素因数の和:4468

約数の個数: 20

約数和(自身を含む): 31929480

約数和(自身を除く): 10916217

約数列:

[1, 3, 9, 27, 59, 81, 177, 531, 1593, 4397, 4779, 13191, 39573, 118719, 259423, 356157, 778269, 2334807, 7004421, 21013263]

約数ペア:

[(1, 21013263), (3, 7004421), (9, 2334807), (27, 778269), (59, 356157), (81, 259423), (177, 118719), (531, 39573), (1593, 13191), (4397, 4779)]