209210291505

素因数分解:

$3^4\times 5^1\times {\mathrm{516568621}}^1$

素因数の和:516568638

約数の個数: 20

約数和(自身を含む): 375028819572

約数和(自身を除く): 165818528067

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 516568621, 1549705863, 2582843105, 4649117589, 7748529315, 13947352767, 23245587945, 41842058301, 69736763835, 209210291505]

約数ペア:

[(1, 209210291505), (3, 69736763835), (5, 41842058301), (9, 23245587945), (15, 13947352767), (27, 7748529315), (45, 4649117589), (81, 2582843105), (135, 1549705863), (405, 516568621)]