21210093

素因数分解:

$3^4\times {\mathrm{401}}^1\times {\mathrm{653}}^1$

素因数の和:1066

約数の個数: 20

約数和(自身を含む): 31811868

約数和(自身を除く): 10601775

約数列:

[1, 3, 9, 27, 81, 401, 653, 1203, 1959, 3609, 5877, 10827, 17631, 32481, 52893, 261853, 785559, 2356677, 7070031, 21210093]

約数ペア:

[(1, 21210093), (3, 7070031), (9, 2356677), (27, 785559), (81, 261853), (401, 52893), (653, 32481), (1203, 17631), (1959, 10827), (3609, 5877)]