81189805

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{4243}}^1$

素因数の和:4380

約数の個数: 16

約数和(自身を含む): 100837440

約数和(自身を除く): 19647635

約数列:

[1, 5, 43, 89, 215, 445, 3827, 4243, 19135, 21215, 182449, 377627, 912245, 1888135, 16237961, 81189805]

約数ペア:

[(1, 81189805), (5, 16237961), (43, 1888135), (89, 912245), (215, 377627), (445, 182449), (3827, 21215), (4243, 19135)]