19985320

素因数分解:

$2^3\times 5^1\times {\mathrm{499633}}^1$

素因数の和:499644

約数の個数: 16

約数和(自身を含む): 44967060

約数和(自身を除く): 24981740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499633, 999266, 1998532, 2498165, 3997064, 4996330, 9992660, 19985320]

約数ペア:

[(1, 19985320), (2, 9992660), (4, 4996330), (5, 3997064), (8, 2498165), (10, 1998532), (20, 999266), (40, 499633)]