81896725

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 111957120

約数和(自身を除く): 30060395

約数列:

[1, 5, 25, 29, 37, 43, 71, 145, 185, 215, 355, 725, 925, 1073, 1075, 1247, 1591, 1775, 2059, 2627, 3053, 5365, 6235, 7955, 10295, 13135, 15265, 26825, 31175, 39775, 46139, 51475, 65675, 76183, 76325, 88537, 112961, 230695, 380915, 442685, 564805, 1153475, 1904575, 2213425, 2824025, 3275869, 16379345, 81896725]

約数ペア:

[(1, 81896725), (5, 16379345), (25, 3275869), (29, 2824025), (37, 2213425), (43, 1904575), (71, 1153475), (145, 564805), (185, 442685), (215, 380915), (355, 230695), (725, 112961), (925, 88537), (1073, 76325), (1075, 76183), (1247, 65675), (1591, 51475), (1775, 46139), (2059, 39775), (2627, 31175), (3053, 26825), (5365, 15265), (6235, 13135), (7955, 10295)]