18685580

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1453}}^1$

素因数の和:2105

約数の個数: 24

約数和(自身を含む): 39327792

約数和(自身を除く): 20642212

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1453, 2572, 2906, 3215, 5812, 6430, 7265, 12860, 14530, 29060, 934279, 1868558, 3737116, 4671395, 9342790, 18685580]

約数ペア:

[(1, 18685580), (2, 9342790), (4, 4671395), (5, 3737116), (10, 1868558), (20, 934279), (643, 29060), (1286, 14530), (1453, 12860), (2572, 7265), (2906, 6430), (3215, 5812)]