21655647

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{599}}^1$

素因数の和:724

約数の個数: 32

約数和(自身を含む): 34944000

約数和(自身を除く): 13288353

約数列:

[1, 3, 9, 13, 27, 39, 103, 117, 309, 351, 599, 927, 1339, 1797, 2781, 4017, 5391, 7787, 12051, 16173, 23361, 36153, 61697, 70083, 185091, 210249, 555273, 802061, 1665819, 2406183, 7218549, 21655647]

約数ペア:

[(1, 21655647), (3, 7218549), (9, 2406183), (13, 1665819), (27, 802061), (39, 555273), (103, 210249), (117, 185091), (309, 70083), (351, 61697), (599, 36153), (927, 23361), (1339, 16173), (1797, 12051), (2781, 7787), (4017, 5391)]