18906805

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{509}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 26438400

約数和(自身を除く): 7531595

約数列:

[1, 5, 17, 19, 23, 85, 95, 115, 323, 391, 437, 509, 1615, 1955, 2185, 2545, 7429, 8653, 9671, 11707, 37145, 43265, 48355, 58535, 164407, 199019, 222433, 822035, 995095, 1112165, 3781361, 18906805]

約数ペア:

[(1, 18906805), (5, 3781361), (17, 1112165), (19, 995095), (23, 822035), (85, 222433), (95, 199019), (115, 164407), (323, 58535), (391, 48355), (437, 43265), (509, 37145), (1615, 11707), (1955, 9671), (2185, 8653), (2545, 7429)]