20805785

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4157}}^1$

素因数の和:4193

約数の個数: 32

約数和(自身を含む): 33530112

約数和(自身を除く): 12724327

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4157, 5005, 20785, 29099, 45727, 54041, 145495, 228635, 270205, 320089, 378287, 594451, 1600445, 1891435, 2972255, 4161157, 20805785]

約数ペア:

[(1, 20805785), (5, 4161157), (7, 2972255), (11, 1891435), (13, 1600445), (35, 594451), (55, 378287), (65, 320089), (77, 270205), (91, 228635), (143, 145495), (385, 54041), (455, 45727), (715, 29099), (1001, 20785), (4157, 5005)]