19881095

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{199}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 27216000

約数和(自身を除く): 7334905

約数列:

[1, 5, 13, 29, 53, 65, 145, 199, 265, 377, 689, 995, 1537, 1885, 2587, 3445, 5771, 7685, 10547, 12935, 19981, 28855, 52735, 75023, 99905, 137111, 305863, 375115, 685555, 1529315, 3976219, 19881095]

約数ペア:

[(1, 19881095), (5, 3976219), (13, 1529315), (29, 685555), (53, 375115), (65, 305863), (145, 137111), (199, 99905), (265, 75023), (377, 52735), (689, 28855), (995, 19981), (1537, 12935), (1885, 10547), (2587, 7685), (3445, 5771)]