18814490

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{421}}^1$

素因数の和:578

約数の個数: 32

約数和(自身を含む): 35093520

約数和(自身を除く): 16279030

約数列:

[1, 2, 5, 10, 41, 82, 109, 205, 218, 410, 421, 545, 842, 1090, 2105, 4210, 4469, 8938, 17261, 22345, 34522, 44690, 45889, 86305, 91778, 172610, 229445, 458890, 1881449, 3762898, 9407245, 18814490]

約数ペア:

[(1, 18814490), (2, 9407245), (5, 3762898), (10, 1881449), (41, 458890), (82, 229445), (109, 172610), (205, 91778), (218, 86305), (410, 45889), (421, 44690), (545, 34522), (842, 22345), (1090, 17261), (2105, 8938), (4210, 4469)]