20110909

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7129}}^1$

素因数の和:7180

約数の個数: 16

約数和(自身を含む): 25553920

約数和(自身を除く): 5443011

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7129, 49903, 92677, 220999, 648739, 1546993, 2872987, 20110909]

約数ペア:

[(1, 20110909), (7, 2872987), (13, 1546993), (31, 648739), (91, 220999), (217, 92677), (403, 49903), (2821, 7129)]