21051080

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12239}}^1$

素因数の和:12293

約数の個数: 32

約数和(自身を含む): 48470400

約数和(自身を除く): 27419320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12239, 24478, 48956, 61195, 97912, 122390, 244780, 489560, 526277, 1052554, 2105108, 2631385, 4210216, 5262770, 10525540, 21051080]

約数ペア:

[(1, 21051080), (2, 10525540), (4, 5262770), (5, 4210216), (8, 2631385), (10, 2105108), (20, 1052554), (40, 526277), (43, 489560), (86, 244780), (172, 122390), (215, 97912), (344, 61195), (430, 48956), (860, 24478), (1720, 12239)]