20127580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{479}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 26321060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 479, 764, 955, 958, 1910, 1916, 2101, 2395, 3820, 4202, 4790, 5269, 8404, 9580, 10505, 10538, 21010, 21076, 26345, 42020, 52690, 91489, 105380, 182978, 365956, 457445, 914890, 1006379, 1829780, 2012758, 4025516, 5031895, 10063790, 20127580]

約数ペア:

[(1, 20127580), (2, 10063790), (4, 5031895), (5, 4025516), (10, 2012758), (11, 1829780), (20, 1006379), (22, 914890), (44, 457445), (55, 365956), (110, 182978), (191, 105380), (220, 91489), (382, 52690), (479, 42020), (764, 26345), (955, 21076), (958, 21010), (1910, 10538), (1916, 10505), (2101, 9580), (2395, 8404), (3820, 5269), (4202, 4790)]