19802320

素因数分解:

$2^4\times 5^1\times {\mathrm{247529}}^1$

素因数の和:247542

約数の個数: 20

約数和(自身を含む): 46040580

約数和(自身を除く): 26238260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247529, 495058, 990116, 1237645, 1980232, 2475290, 3960464, 4950580, 9901160, 19802320]

約数ペア:

[(1, 19802320), (2, 9901160), (4, 4950580), (5, 3960464), (8, 2475290), (10, 1980232), (16, 1237645), (20, 990116), (40, 495058), (80, 247529)]