19991031

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{3881}}^1$

素因数の和:4002

約数の個数: 16

約数和(自身を含む): 28509408

約数和(自身を除く): 8518377

約数列:

[1, 3, 17, 51, 101, 303, 1717, 3881, 5151, 11643, 65977, 197931, 391981, 1175943, 6663677, 19991031]

約数ペア:

[(1, 19991031), (3, 6663677), (17, 1175943), (51, 391981), (101, 197931), (303, 65977), (1717, 11643), (3881, 5151)]