21286738

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{6961}}^1$

素因数の和:7113

約数の個数: 16

約数和(自身を含む): 35088480

約数和(自身を除く): 13801742

約数列:

[1, 2, 11, 22, 139, 278, 1529, 3058, 6961, 13922, 76571, 153142, 967579, 1935158, 10643369, 21286738]

約数ペア:

[(1, 21286738), (2, 10643369), (11, 1935158), (22, 967579), (139, 153142), (278, 76571), (1529, 13922), (3058, 6961)]