19991480

素因数分解:

$2^3\times 5^1\times {\mathrm{499787}}^1$

素因数の和:499798

約数の個数: 16

約数和(自身を含む): 44980920

約数和(自身を除く): 24989440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499787, 999574, 1999148, 2498935, 3998296, 4997870, 9995740, 19991480]

約数ペア:

[(1, 19991480), (2, 9995740), (4, 4997870), (5, 3998296), (8, 2498935), (10, 1999148), (20, 999574), (40, 499787)]