1995721

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{241}}^1$

素因数の和:281

約数の個数: 18

約数和(自身を含む): 2524302

約数和(自身を除く): 528581

約数列:

[1, 7, 13, 49, 91, 169, 241, 637, 1183, 1687, 3133, 8281, 11809, 21931, 40729, 153517, 285103, 1995721]

約数ペア:

[(1, 1995721), (7, 285103), (13, 153517), (49, 40729), (91, 21931), (169, 11809), (241, 8281), (637, 3133), (1183, 1687)]