18981898

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{73}}^2\times {\mathrm{137}}^1$

素因数の和:298

約数の個数: 24

約数和(自身を含む): 31315788

約数和(自身を除く): 12333890

約数列:

[1, 2, 13, 26, 73, 137, 146, 274, 949, 1781, 1898, 3562, 5329, 10001, 10658, 20002, 69277, 130013, 138554, 260026, 730073, 1460146, 9490949, 18981898]

約数ペア:

[(1, 18981898), (2, 9490949), (13, 1460146), (26, 730073), (73, 260026), (137, 138554), (146, 130013), (274, 69277), (949, 20002), (1781, 10658), (1898, 10001), (3562, 5329)]