18139120

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5273}}^1$

素因数の和:5329

約数の個数: 40

約数和(自身を含む): 43162416

約数和(自身を除く): 25023296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5273, 10546, 21092, 26365, 42184, 52730, 84368, 105460, 210920, 226739, 421840, 453478, 906956, 1133695, 1813912, 2267390, 3627824, 4534780, 9069560, 18139120]

約数ペア:

[(1, 18139120), (2, 9069560), (4, 4534780), (5, 3627824), (8, 2267390), (10, 1813912), (16, 1133695), (20, 906956), (40, 453478), (43, 421840), (80, 226739), (86, 210920), (172, 105460), (215, 84368), (344, 52730), (430, 42184), (688, 26365), (860, 21092), (1720, 10546), (3440, 5273)]