81887845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:565

約数の個数: 32

約数和(自身を含む): 110315520

約数和(自身を除く): 28427675

約数列:

[1, 5, 13, 37, 65, 79, 185, 395, 431, 481, 1027, 2155, 2405, 2923, 5135, 5603, 14615, 15947, 28015, 34049, 37999, 79735, 170245, 189995, 207311, 442637, 1036555, 1259813, 2213185, 6299065, 16377569, 81887845]

約数ペア:

[(1, 81887845), (5, 16377569), (13, 6299065), (37, 2213185), (65, 1259813), (79, 1036555), (185, 442637), (395, 207311), (431, 189995), (481, 170245), (1027, 79735), (2155, 37999), (2405, 34049), (2923, 28015), (5135, 15947), (5603, 14615)]