21681647

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:275

約数の個数: 24

約数和(自身を含む): 25788000

約数和(自身を除く): 4106353

約数列:

[1, 13, 17, 29, 199, 221, 289, 377, 493, 2587, 3383, 3757, 5771, 6409, 8381, 43979, 57511, 75023, 98107, 108953, 747643, 1275391, 1667819, 21681647]

約数ペア:

[(1, 21681647), (13, 1667819), (17, 1275391), (29, 747643), (199, 108953), (221, 98107), (289, 75023), (377, 57511), (493, 43979), (2587, 8381), (3383, 6409), (3757, 5771)]