81859856

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393557}}^1$

素因数の和:393578

約数の個数: 20

約数和(自身を含む): 170804172

約数和(自身を除く): 88944316

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393557, 787114, 1574228, 3148456, 5116241, 6296912, 10232482, 20464964, 40929928, 81859856]

約数ペア:

[(1, 81859856), (2, 40929928), (4, 20464964), (8, 10232482), (13, 6296912), (16, 5116241), (26, 3148456), (52, 1574228), (104, 787114), (208, 393557)]