20404503

素因数分解:

$3^2\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1987}}^1$

素因数の和:2163

約数の個数: 24

約数和(自身を含む): 33907328

約数和(自身を除く): 13502825

約数列:

[1, 3, 7, 9, 21, 63, 163, 489, 1141, 1467, 1987, 3423, 5961, 10269, 13909, 17883, 41727, 125181, 323881, 971643, 2267167, 2914929, 6801501, 20404503]

約数ペア:

[(1, 20404503), (3, 6801501), (7, 2914929), (9, 2267167), (21, 971643), (63, 323881), (163, 125181), (489, 41727), (1141, 17883), (1467, 13909), (1987, 10269), (3423, 5961)]