20137780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1061}}^1$

素因数の和:1156

約数の個数: 48

約数和(自身を含む): 46209744

約数和(自身を除く): 26071964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1061, 1460, 1898, 2122, 3796, 4244, 4745, 5305, 9490, 10610, 13793, 18980, 21220, 27586, 55172, 68965, 77453, 137930, 154906, 275860, 309812, 387265, 774530, 1006889, 1549060, 2013778, 4027556, 5034445, 10068890, 20137780]

約数ペア:

[(1, 20137780), (2, 10068890), (4, 5034445), (5, 4027556), (10, 2013778), (13, 1549060), (20, 1006889), (26, 774530), (52, 387265), (65, 309812), (73, 275860), (130, 154906), (146, 137930), (260, 77453), (292, 68965), (365, 55172), (730, 27586), (949, 21220), (1061, 18980), (1460, 13793), (1898, 10610), (2122, 9490), (3796, 5305), (4244, 4745)]