81318425

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{317}}^1\times {\mathrm{331}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 104731392

約数和(自身を除く): 23412967

約数列:

[1, 5, 25, 31, 155, 317, 331, 775, 1585, 1655, 7925, 8275, 9827, 10261, 49135, 51305, 104927, 245675, 256525, 524635, 2623175, 3252737, 16263685, 81318425]

約数ペア:

[(1, 81318425), (5, 16263685), (25, 3252737), (31, 2623175), (155, 524635), (317, 256525), (331, 245675), (775, 104927), (1585, 51305), (1655, 49135), (7925, 10261), (8275, 9827)]