18888220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72647}}^1$

素因数の和:72669

約数の個数: 24

約数和(自身を含む): 42717024

約数和(自身を除く): 23828804

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72647, 145294, 290588, 363235, 726470, 944411, 1452940, 1888822, 3777644, 4722055, 9444110, 18888220]

約数ペア:

[(1, 18888220), (2, 9444110), (4, 4722055), (5, 3777644), (10, 1888822), (13, 1452940), (20, 944411), (26, 726470), (52, 363235), (65, 290588), (130, 145294), (260, 72647)]