20110727

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 25491312

約数和(自身を除く): 5380585

約数列:

[1, 7, 13, 49, 91, 131, 241, 637, 917, 1687, 1703, 3133, 6419, 11809, 11921, 21931, 31571, 83447, 153517, 220997, 410423, 1546979, 2872961, 20110727]

約数ペア:

[(1, 20110727), (7, 2872961), (13, 1546979), (49, 410423), (91, 220997), (131, 153517), (241, 83447), (637, 31571), (917, 21931), (1687, 11921), (1703, 11809), (3133, 6419)]