20420900

素因数分解:

$2^2\times 5^2\times {\mathrm{53}}^1\times {\mathrm{3853}}^1$

素因数の和:3920

約数の個数: 36

約数和(自身を含む): 45161172

約数和(自身を除く): 24740272

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 100, 106, 212, 265, 530, 1060, 1325, 2650, 3853, 5300, 7706, 15412, 19265, 38530, 77060, 96325, 192650, 204209, 385300, 408418, 816836, 1021045, 2042090, 4084180, 5105225, 10210450, 20420900]

約数ペア:

[(1, 20420900), (2, 10210450), (4, 5105225), (5, 4084180), (10, 2042090), (20, 1021045), (25, 816836), (50, 408418), (53, 385300), (100, 204209), (106, 192650), (212, 96325), (265, 77060), (530, 38530), (1060, 19265), (1325, 15412), (2650, 7706), (3853, 5300)]