18389620

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 21446540

約数列:

[1, 2, 4, 5, 10, 20, 79, 103, 113, 158, 206, 226, 316, 395, 412, 452, 515, 565, 790, 1030, 1130, 1580, 2060, 2260, 8137, 8927, 11639, 16274, 17854, 23278, 32548, 35708, 40685, 44635, 46556, 58195, 81370, 89270, 116390, 162740, 178540, 232780, 919481, 1838962, 3677924, 4597405, 9194810, 18389620]

約数ペア:

[(1, 18389620), (2, 9194810), (4, 4597405), (5, 3677924), (10, 1838962), (20, 919481), (79, 232780), (103, 178540), (113, 162740), (158, 116390), (206, 89270), (226, 81370), (316, 58195), (395, 46556), (412, 44635), (452, 40685), (515, 35708), (565, 32548), (790, 23278), (1030, 17854), (1130, 16274), (1580, 11639), (2060, 8927), (2260, 8137)]