28139805

素因数分解:

$3^4\times 5^1\times {\mathrm{69481}}^1$

素因数の和:69498

約数の個数: 20

約数和(自身を含む): 50443932

約数和(自身を除く): 22304127

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 69481, 208443, 347405, 625329, 1042215, 1875987, 3126645, 5627961, 9379935, 28139805]

約数ペア:

[(1, 28139805), (3, 9379935), (5, 5627961), (9, 3126645), (15, 1875987), (27, 1042215), (45, 625329), (81, 347405), (135, 208443), (405, 69481)]