20418680

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10861}}^1$

素因数の和:10919

約数の個数: 32

約数和(自身を含む): 46923840

約数和(自身を除く): 26505160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 10861, 21722, 43444, 54305, 86888, 108610, 217220, 434440, 510467, 1020934, 2041868, 2552335, 4083736, 5104670, 10209340, 20418680]

約数ペア:

[(1, 20418680), (2, 10209340), (4, 5104670), (5, 4083736), (8, 2552335), (10, 2041868), (20, 1020934), (40, 510467), (47, 434440), (94, 217220), (188, 108610), (235, 86888), (376, 54305), (470, 43444), (940, 21722), (1880, 10861)]