20398895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21817}}^1$

素因数の和:21850

約数の個数: 16

約数和(自身を含む): 28276128

約数和(自身を除く): 7877233

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 21817, 109085, 239987, 370889, 1199935, 1854445, 4079779, 20398895]

約数ペア:

[(1, 20398895), (5, 4079779), (11, 1854445), (17, 1199935), (55, 370889), (85, 239987), (187, 109085), (935, 21817)]