19849765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{9851}}^1$

素因数の和:9900

約数の個数: 16

約数和(自身を含む): 26482176

約数和(自身を除く): 6632411

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 9851, 49255, 128063, 305381, 640315, 1526905, 3969953, 19849765]

約数ペア:

[(1, 19849765), (5, 3969953), (13, 1526905), (31, 640315), (65, 305381), (155, 128063), (403, 49255), (2015, 9851)]