638615727

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{245527}}^1$

素因数の和:245567

約数の個数: 18

約数和(自身を含む): 979902248

約数和(自身を除く): 341286521

約数列:

[1, 3, 9, 17, 51, 153, 289, 867, 2601, 245527, 736581, 2209743, 4173959, 12521877, 37565631, 70957303, 212871909, 638615727]

約数ペア:

[(1, 638615727), (3, 212871909), (9, 70957303), (17, 37565631), (51, 12521877), (153, 4173959), (289, 2209743), (867, 736581), (2601, 245527)]