21921529

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{1087}}^1$

素因数の和:1204

約数の個数: 16

約数和(自身を含む): 26042368

約数和(自身を除く): 4120839

約数列:

[1, 7, 43, 67, 301, 469, 1087, 2881, 7609, 20167, 46741, 72829, 327187, 509803, 3131647, 21921529]

約数ペア:

[(1, 21921529), (7, 3131647), (43, 509803), (67, 327187), (301, 72829), (469, 46741), (1087, 20167), (2881, 7609)]