28205775

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{9643}}^1$

素因数の和:9672

約数の個数: 36

約数和(自身を含む): 54411448

約数和(自身を除く): 26205673

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 9643, 28929, 48215, 86787, 125359, 144645, 241075, 376077, 433935, 626795, 723225, 1128231, 1880385, 2169675, 3133975, 5641155, 9401925, 28205775]

約数ペア:

[(1, 28205775), (3, 9401925), (5, 5641155), (9, 3133975), (13, 2169675), (15, 1880385), (25, 1128231), (39, 723225), (45, 626795), (65, 433935), (75, 376077), (117, 241075), (195, 144645), (225, 125359), (325, 86787), (585, 48215), (975, 28929), (2925, 9643)]