1644005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:508

約数の個数: 16

約数和(自身を含む): 2187648

約数和(自身を除く): 543643

約数列:

[1, 5, 11, 55, 71, 355, 421, 781, 2105, 3905, 4631, 23155, 29891, 149455, 328801, 1644005]

約数ペア:

[(1, 1644005), (5, 328801), (11, 149455), (55, 29891), (71, 23155), (355, 4631), (421, 3905), (781, 2105)]