31721391

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1979}}^1$

素因数の和:2135

約数の個数: 24

約数和(自身を含む): 49729680

約数和(自身を除く): 18008289

約数列:

[1, 3, 9, 13, 39, 117, 137, 411, 1233, 1781, 1979, 5343, 5937, 16029, 17811, 25727, 77181, 231543, 271123, 813369, 2440107, 3524599, 10573797, 31721391]

約数ペア:

[(1, 31721391), (3, 10573797), (9, 3524599), (13, 2440107), (39, 813369), (117, 271123), (137, 231543), (411, 77181), (1233, 25727), (1781, 17811), (1979, 16029), (5343, 5937)]