128513721

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{21323}}^1$

素因数の和:21381

約数の個数: 24

約数和(自身を含む): 204198624

約数和(自身を除く): 75684903

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 6027, 21323, 63969, 149261, 447783, 874243, 1044827, 2622729, 3134481, 6119701, 18359103, 42837907, 128513721]

約数ペア:

[(1, 128513721), (3, 42837907), (7, 18359103), (21, 6119701), (41, 3134481), (49, 2622729), (123, 1044827), (147, 874243), (287, 447783), (861, 149261), (2009, 63969), (6027, 21323)]