19910978

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{13619}}^1$

素因数の和:13681

約数の個数: 16

約数和(自身を含む): 32361120

約数和(自身を除く): 12450142

約数列:

[1, 2, 17, 34, 43, 86, 731, 1462, 13619, 27238, 231523, 463046, 585617, 1171234, 9955489, 19910978]

約数ペア:

[(1, 19910978), (2, 9955489), (17, 1171234), (34, 585617), (43, 463046), (86, 231523), (731, 27238), (1462, 13619)]