18838520

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4663}}^1$

素因数の和:4775

約数の個数: 32

約数和(自身を含む): 42815520

約数和(自身を除く): 23977000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4663, 9326, 18652, 23315, 37304, 46630, 93260, 186520, 470963, 941926, 1883852, 2354815, 3767704, 4709630, 9419260, 18838520]

約数ペア:

[(1, 18838520), (2, 9419260), (4, 4709630), (5, 3767704), (8, 2354815), (10, 1883852), (20, 941926), (40, 470963), (101, 186520), (202, 93260), (404, 46630), (505, 37304), (808, 23315), (1010, 18652), (2020, 9326), (4040, 4663)]