20490320

素因数分解:

$2^4\times 5^1\times {\mathrm{256129}}^1$

素因数の和:256142

約数の個数: 20

約数和(自身を含む): 47640180

約数和(自身を除く): 27149860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256129, 512258, 1024516, 1280645, 2049032, 2561290, 4098064, 5122580, 10245160, 20490320]

約数ペア:

[(1, 20490320), (2, 10245160), (4, 5122580), (5, 4098064), (8, 2561290), (10, 2049032), (16, 1280645), (20, 1024516), (40, 512258), (80, 256129)]