81969975

素因数分解:

$3^5\times 5^2\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 154906752

約数和(自身を除く): 72936777

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 103, 131, 135, 225, 243, 309, 393, 405, 515, 655, 675, 927, 1179, 1215, 1545, 1965, 2025, 2575, 2781, 3275, 3537, 4635, 5895, 6075, 7725, 8343, 9825, 10611, 13493, 13905, 17685, 23175, 25029, 29475, 31833, 40479, 41715, 53055, 67465, 69525, 88425, 121437, 125145, 159165, 202395, 208575, 265275, 337325, 364311, 607185, 625725, 795825, 1011975, 1092933, 1821555, 3035925, 3278799, 5464665, 9107775, 16393995, 27323325, 81969975]

約数ペア:

[(1, 81969975), (3, 27323325), (5, 16393995), (9, 9107775), (15, 5464665), (25, 3278799), (27, 3035925), (45, 1821555), (75, 1092933), (81, 1011975), (103, 795825), (131, 625725), (135, 607185), (225, 364311), (243, 337325), (309, 265275), (393, 208575), (405, 202395), (515, 159165), (655, 125145), (675, 121437), (927, 88425), (1179, 69525), (1215, 67465), (1545, 53055), (1965, 41715), (2025, 40479), (2575, 31833), (2781, 29475), (3275, 25029), (3537, 23175), (4635, 17685), (5895, 13905), (6075, 13493), (7725, 10611), (8343, 9825)]