28771405

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:541

約数の個数: 24

約数和(自身を含む): 37946880

約数和(自身を除く): 9175475

約数列:

[1, 5, 13, 65, 79, 169, 395, 431, 845, 1027, 2155, 5135, 5603, 13351, 28015, 34049, 66755, 72839, 170245, 364195, 442637, 2213185, 5754281, 28771405]

約数ペア:

[(1, 28771405), (5, 5754281), (13, 2213185), (65, 442637), (79, 364195), (169, 170245), (395, 72839), (431, 66755), (845, 34049), (1027, 28015), (2155, 13351), (5135, 5603)]