81025165

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{509}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 109670400

約数和(自身を除く): 28645235

約数列:

[1, 5, 13, 31, 65, 79, 155, 395, 403, 509, 1027, 2015, 2449, 2545, 5135, 6617, 12245, 15779, 31837, 33085, 40211, 78895, 159185, 201055, 205127, 522743, 1025635, 1246541, 2613715, 6232705, 16205033, 81025165]

約数ペア:

[(1, 81025165), (5, 16205033), (13, 6232705), (31, 2613715), (65, 1246541), (79, 1025635), (155, 522743), (395, 205127), (403, 201055), (509, 159185), (1027, 78895), (2015, 40211), (2449, 33085), (2545, 31837), (5135, 15779), (6617, 12245)]