15520005

素因数分解:

$3^4\times 5^1\times {\mathrm{38321}}^1$

素因数の和:38338

約数の個数: 20

約数和(自身を含む): 27821772

約数和(自身を除く): 12301767

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 38321, 114963, 191605, 344889, 574815, 1034667, 1724445, 3104001, 5173335, 15520005]

約数ペア:

[(1, 15520005), (3, 5173335), (5, 3104001), (9, 1724445), (15, 1034667), (27, 574815), (45, 344889), (81, 191605), (135, 114963), (405, 38321)]