20678020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{487}}^1$

素因数の和:700

約数の個数: 48

約数和(自身を含む): 47714688

約数和(自身を除く): 27036668

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 193, 220, 386, 487, 772, 965, 974, 1930, 1948, 2123, 2435, 3860, 4246, 4870, 5357, 8492, 9740, 10615, 10714, 21230, 21428, 26785, 42460, 53570, 93991, 107140, 187982, 375964, 469955, 939910, 1033901, 1879820, 2067802, 4135604, 5169505, 10339010, 20678020]

約数ペア:

[(1, 20678020), (2, 10339010), (4, 5169505), (5, 4135604), (10, 2067802), (11, 1879820), (20, 1033901), (22, 939910), (44, 469955), (55, 375964), (110, 187982), (193, 107140), (220, 93991), (386, 53570), (487, 42460), (772, 26785), (965, 21428), (974, 21230), (1930, 10714), (1948, 10615), (2123, 9740), (2435, 8492), (3860, 5357), (4246, 4870)]