28480005

素因数分解:

$3^4\times 5^1\times {\mathrm{70321}}^1$

素因数の和:70338

約数の個数: 20

約数和(自身を含む): 51053772

約数和(自身を除く): 22573767

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70321, 210963, 351605, 632889, 1054815, 1898667, 3164445, 5696001, 9493335, 28480005]

約数ペア:

[(1, 28480005), (3, 9493335), (5, 5696001), (9, 3164445), (15, 1898667), (27, 1054815), (45, 632889), (81, 351605), (135, 210963), (405, 70321)]