18726340

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{557}}^1$

素因数の和:648

約数の個数: 36

約数和(自身を含む): 40380228

約数和(自身を除く): 21653888

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 557, 820, 1114, 1681, 2228, 2785, 3362, 5570, 6724, 8405, 11140, 16810, 22837, 33620, 45674, 91348, 114185, 228370, 456740, 936317, 1872634, 3745268, 4681585, 9363170, 18726340]

約数ペア:

[(1, 18726340), (2, 9363170), (4, 4681585), (5, 3745268), (10, 1872634), (20, 936317), (41, 456740), (82, 228370), (164, 114185), (205, 91348), (410, 45674), (557, 33620), (820, 22837), (1114, 16810), (1681, 11140), (2228, 8405), (2785, 6724), (3362, 5570)]