21748095

素因数分解:

$3^4\times 5^1\times {\mathrm{53699}}^1$

素因数の和:53716

約数の個数: 20

約数和(自身を含む): 38986200

約数和(自身を除く): 17238105

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53699, 161097, 268495, 483291, 805485, 1449873, 2416455, 4349619, 7249365, 21748095]

約数ペア:

[(1, 21748095), (3, 7249365), (5, 4349619), (9, 2416455), (15, 1449873), (27, 805485), (45, 483291), (81, 268495), (135, 161097), (405, 53699)]