20858000

素因数分解:

$2^4\times 5^3\times {\mathrm{10429}}^1$

素因数の和:10452

約数の個数: 40

約数和(自身を含む): 50439480

約数和(自身を除く): 29581480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10429, 20858, 41716, 52145, 83432, 104290, 166864, 208580, 260725, 417160, 521450, 834320, 1042900, 1303625, 2085800, 2607250, 4171600, 5214500, 10429000, 20858000]

約数ペア:

[(1, 20858000), (2, 10429000), (4, 5214500), (5, 4171600), (8, 2607250), (10, 2085800), (16, 1303625), (20, 1042900), (25, 834320), (40, 521450), (50, 417160), (80, 260725), (100, 208580), (125, 166864), (200, 104290), (250, 83432), (400, 52145), (500, 41716), (1000, 20858), (2000, 10429)]