19880315

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{3361}}^1$

素因数の和:3399

約数の個数: 24

約数和(自身を含む): 29531808

約数和(自身を除く): 9651493

約数列:

[1, 5, 7, 13, 35, 65, 91, 169, 455, 845, 1183, 3361, 5915, 16805, 23527, 43693, 117635, 218465, 305851, 568009, 1529255, 2840045, 3976063, 19880315]

約数ペア:

[(1, 19880315), (5, 3976063), (7, 2840045), (13, 1529255), (35, 568009), (65, 305851), (91, 218465), (169, 117635), (455, 43693), (845, 23527), (1183, 16805), (3361, 5915)]