20853729

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1301}}^1$

素因数の和:1457

約数の個数: 24

約数和(自身を含む): 32701032

約数和(自身を除く): 11847303

約数列:

[1, 3, 9, 13, 39, 117, 137, 411, 1233, 1301, 1781, 3903, 5343, 11709, 16029, 16913, 50739, 152217, 178237, 534711, 1604133, 2317081, 6951243, 20853729]

約数ペア:

[(1, 20853729), (3, 6951243), (9, 2317081), (13, 1604133), (39, 534711), (117, 178237), (137, 152217), (411, 50739), (1233, 16913), (1301, 16029), (1781, 11709), (3903, 5343)]