18728620

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{8287}}^1$

素因数の和:8409

約数の個数: 24

約数和(自身を含む): 39682944

約数和(自身を除く): 20954324

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 8287, 16574, 33148, 41435, 82870, 165740, 936431, 1872862, 3745724, 4682155, 9364310, 18728620]

約数ペア:

[(1, 18728620), (2, 9364310), (4, 4682155), (5, 3745724), (10, 1872862), (20, 936431), (113, 165740), (226, 82870), (452, 41435), (565, 33148), (1130, 16574), (2260, 8287)]