19978357

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1\times {\mathrm{461}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 23595264

約数和(自身を除く): 3616907

約数列:

[1, 7, 41, 151, 287, 461, 1057, 3227, 6191, 18901, 43337, 69611, 132307, 487277, 2854051, 19978357]

約数ペア:

[(1, 19978357), (7, 2854051), (41, 487277), (151, 132307), (287, 69611), (461, 43337), (1057, 18901), (3227, 6191)]