18985785

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1987}}^1$

素因数の和:2022

約数の個数: 48

約数和(自身を含む): 38074176

約数和(自身を除く): 19088391

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 1987, 3185, 5961, 9555, 9935, 13909, 25831, 29805, 41727, 69545, 77493, 97363, 129155, 180817, 208635, 292089, 387465, 486815, 542451, 904085, 1265719, 1460445, 2712255, 3797157, 6328595, 18985785]

約数ペア:

[(1, 18985785), (3, 6328595), (5, 3797157), (7, 2712255), (13, 1460445), (15, 1265719), (21, 904085), (35, 542451), (39, 486815), (49, 387465), (65, 292089), (91, 208635), (105, 180817), (147, 129155), (195, 97363), (245, 77493), (273, 69545), (455, 41727), (637, 29805), (735, 25831), (1365, 13909), (1911, 9935), (1987, 9555), (3185, 5961)]