18918860

素因数分解:

$2^2\times 5^1\times {\mathrm{945943}}^1$

素因数の和:945952

約数の個数: 12

約数和(自身を含む): 39729648

約数和(自身を除く): 20810788

約数列:

[1, 2, 4, 5, 10, 20, 945943, 1891886, 3783772, 4729715, 9459430, 18918860]

約数ペア:

[(1, 18918860), (2, 9459430), (4, 4729715), (5, 3783772), (10, 1891886), (20, 945943)]