21120343

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{353}}^1$

素因数の和:486

約数の個数: 16

約数和(自身を含む): 23109120

約数和(自身を除く): 1988777

約数列:

[1, 19, 47, 67, 353, 893, 1273, 3149, 6707, 16591, 23651, 59831, 315229, 449369, 1111597, 21120343]

約数ペア:

[(1, 21120343), (19, 1111597), (47, 449369), (67, 315229), (353, 59831), (893, 23651), (1273, 16591), (3149, 6707)]