19916740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23159}}^1$

素因数の和:23211

約数の個数: 24

約数和(自身を含む): 42799680

約数和(自身を除く): 22882940

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23159, 46318, 92636, 115795, 231590, 463180, 995837, 1991674, 3983348, 4979185, 9958370, 19916740]

約数ペア:

[(1, 19916740), (2, 9958370), (4, 4979185), (5, 3983348), (10, 1991674), (20, 995837), (43, 463180), (86, 231590), (172, 115795), (215, 92636), (430, 46318), (860, 23159)]