21161493

素因数分解:

$3^4\times {\mathrm{79}}^1\times {\mathrm{3307}}^1$

素因数の和:3398

約数の個数: 20

約数和(自身を含む): 32021440

約数和(自身を除く): 10859947

約数列:

[1, 3, 9, 27, 79, 81, 237, 711, 2133, 3307, 6399, 9921, 29763, 89289, 261253, 267867, 783759, 2351277, 7053831, 21161493]

約数ペア:

[(1, 21161493), (3, 7053831), (9, 2351277), (27, 783759), (79, 267867), (81, 261253), (237, 89289), (711, 29763), (2133, 9921), (3307, 6399)]