21261513

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4099}}^1$

素因数の和:4141

約数の個数: 32

約数和(自身を含む): 36736000

約数和(自身を除く): 15474487

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 4099, 5187, 12297, 28693, 53287, 77881, 86079, 159861, 233643, 373009, 545167, 1012453, 1119027, 1635501, 3037359, 7087171, 21261513]

約数ペア:

[(1, 21261513), (3, 7087171), (7, 3037359), (13, 1635501), (19, 1119027), (21, 1012453), (39, 545167), (57, 373009), (91, 233643), (133, 159861), (247, 86079), (273, 77881), (399, 53287), (741, 28693), (1729, 12297), (4099, 5187)]