81181925

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{571}}^1$

素因数の和:650

約数の個数: 36

約数和(自身を含む): 113201088

約数和(自身を除く): 32019163

約数列:

[1, 5, 11, 25, 47, 55, 121, 235, 275, 517, 571, 605, 1175, 2585, 2855, 3025, 5687, 6281, 12925, 14275, 26837, 28435, 31405, 69091, 134185, 142175, 157025, 295207, 345455, 670925, 1476035, 1727275, 3247277, 7380175, 16236385, 81181925]

約数ペア:

[(1, 81181925), (5, 16236385), (11, 7380175), (25, 3247277), (47, 1727275), (55, 1476035), (121, 670925), (235, 345455), (275, 295207), (517, 157025), (571, 142175), (605, 134185), (1175, 69091), (2585, 31405), (2855, 28435), (3025, 26837), (5687, 14275), (6281, 12925)]