20819781

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{677}}^1$

素因数の和:770

約数の個数: 32

約数和(自身を含む): 33194880

約数和(自身を除く): 12375099

約数列:

[1, 3, 9, 17, 27, 51, 67, 153, 201, 459, 603, 677, 1139, 1809, 2031, 3417, 6093, 10251, 11509, 18279, 30753, 34527, 45359, 103581, 136077, 310743, 408231, 771103, 1224693, 2313309, 6939927, 20819781]

約数ペア:

[(1, 20819781), (3, 6939927), (9, 2313309), (17, 1224693), (27, 771103), (51, 408231), (67, 310743), (153, 136077), (201, 103581), (459, 45359), (603, 34527), (677, 30753), (1139, 18279), (1809, 11509), (2031, 10251), (3417, 6093)]