21019217

素因数分解:

${\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 22923648

約数和(自身を除く): 1904431

約数列:

[1, 23, 43, 53, 401, 989, 1219, 2279, 9223, 17243, 21253, 52417, 396589, 488819, 913879, 21019217]

約数ペア:

[(1, 21019217), (23, 913879), (43, 488819), (53, 396589), (401, 52417), (989, 21253), (1219, 17243), (2279, 9223)]