18870808

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{4987}}^1$

素因数の和:5047

約数の個数: 32

約数和(自身を含む): 39504960

約数和(自身を除く): 20634152

約数列:

[1, 2, 4, 8, 11, 22, 43, 44, 86, 88, 172, 344, 473, 946, 1892, 3784, 4987, 9974, 19948, 39896, 54857, 109714, 214441, 219428, 428882, 438856, 857764, 1715528, 2358851, 4717702, 9435404, 18870808]

約数ペア:

[(1, 18870808), (2, 9435404), (4, 4717702), (8, 2358851), (11, 1715528), (22, 857764), (43, 438856), (44, 428882), (86, 219428), (88, 214441), (172, 109714), (344, 54857), (473, 39896), (946, 19948), (1892, 9974), (3784, 4987)]