21388431608

素因数分解:

$2^3\times {\mathrm{641}}^1\times {\mathrm{4170911}}^1$

素因数の和:4171558

約数の個数: 16

約数和(自身を含む): 40165882560

約数和(自身を除く): 18777450952

約数列:

[1, 2, 4, 8, 641, 1282, 2564, 5128, 4170911, 8341822, 16683644, 33367288, 2673553951, 5347107902, 10694215804, 21388431608]

約数ペア:

[(1, 21388431608), (2, 10694215804), (4, 5347107902), (8, 2673553951), (641, 33367288), (1282, 16683644), (2564, 8341822), (5128, 4170911)]