20485125

素因数分解:

$3^2\times 5^3\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:291

約数の個数: 48

約数和(自身を含む): 37477440

約数和(自身を除く): 16992315

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 125, 131, 139, 225, 375, 393, 417, 655, 695, 1125, 1179, 1251, 1965, 2085, 3275, 3475, 5895, 6255, 9825, 10425, 16375, 17375, 18209, 29475, 31275, 49125, 52125, 54627, 91045, 147375, 156375, 163881, 273135, 455225, 819405, 1365675, 2276125, 4097025, 6828375, 20485125]

約数ペア:

[(1, 20485125), (3, 6828375), (5, 4097025), (9, 2276125), (15, 1365675), (25, 819405), (45, 455225), (75, 273135), (125, 163881), (131, 156375), (139, 147375), (225, 91045), (375, 54627), (393, 52125), (417, 49125), (655, 31275), (695, 29475), (1125, 18209), (1179, 17375), (1251, 16375), (1965, 10425), (2085, 9825), (3275, 6255), (3475, 5895)]