81371775

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{3359}}^1$

素因数の和:3408

約数の個数: 48

約数和(自身を含む): 149990400

約数和(自身を除く): 68618625

約数列:

[1, 3, 5, 15, 17, 19, 25, 51, 57, 75, 85, 95, 255, 285, 323, 425, 475, 969, 1275, 1425, 1615, 3359, 4845, 8075, 10077, 16795, 24225, 50385, 57103, 63821, 83975, 171309, 191463, 251925, 285515, 319105, 856545, 957315, 1084957, 1427575, 1595525, 3254871, 4282725, 4786575, 5424785, 16274355, 27123925, 81371775]

約数ペア:

[(1, 81371775), (3, 27123925), (5, 16274355), (15, 5424785), (17, 4786575), (19, 4282725), (25, 3254871), (51, 1595525), (57, 1427575), (75, 1084957), (85, 957315), (95, 856545), (255, 319105), (285, 285515), (323, 251925), (425, 191463), (475, 171309), (969, 83975), (1275, 63821), (1425, 57103), (1615, 50385), (3359, 24225), (4845, 16795), (8075, 10077)]