12938140

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1663}}^1$

素因数の和:2061

約数の個数: 24

約数和(自身を含む): 27256320

約数和(自身を除く): 14318180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1663, 1945, 3326, 3890, 6652, 7780, 8315, 16630, 33260, 646907, 1293814, 2587628, 3234535, 6469070, 12938140]

約数ペア:

[(1, 12938140), (2, 6469070), (4, 3234535), (5, 2587628), (10, 1293814), (20, 646907), (389, 33260), (778, 16630), (1556, 8315), (1663, 7780), (1945, 6652), (3326, 3890)]