7820215

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3881}}^1$

素因数の和:3930

約数の個数: 16

約数和(自身を含む): 10434816

約数和(自身を除く): 2614601

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 3881, 19405, 50453, 120311, 252265, 601555, 1564043, 7820215]

約数ペア:

[(1, 7820215), (5, 1564043), (13, 601555), (31, 252265), (65, 120311), (155, 50453), (403, 19405), (2015, 3881)]