216855145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{443}}^2$

素因数の和:921

約数の個数: 24

約数和(自身を含む): 297399816

約数和(自身を除く): 80544671

約数列:

[1, 5, 13, 17, 65, 85, 221, 443, 1105, 2215, 5759, 7531, 28795, 37655, 97903, 196249, 489515, 981245, 2551237, 3336233, 12756185, 16681165, 43371029, 216855145]

約数ペア:

[(1, 216855145), (5, 43371029), (13, 16681165), (17, 12756185), (65, 3336233), (85, 2551237), (221, 981245), (443, 489515), (1105, 196249), (2215, 97903), (5759, 37655), (7531, 28795)]