19954805

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{433}}^1\times {\mathrm{709}}^1$

素因数の和:1160

約数の個数: 16

約数和(自身を含む): 25883760

約数和(自身を除く): 5928955

約数列:

[1, 5, 13, 65, 433, 709, 2165, 3545, 5629, 9217, 28145, 46085, 306997, 1534985, 3990961, 19954805]

約数ペア:

[(1, 19954805), (5, 3990961), (13, 1534985), (65, 306997), (433, 46085), (709, 28145), (2165, 9217), (3545, 5629)]