639848

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{661}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 1320690

約数和(自身を除く): 680842

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 121, 242, 484, 661, 968, 1322, 2644, 5288, 7271, 14542, 29084, 58168, 79981, 159962, 319924, 639848]

約数ペア:

[(1, 639848), (2, 319924), (4, 159962), (8, 79981), (11, 58168), (22, 29084), (44, 14542), (88, 7271), (121, 5288), (242, 2644), (484, 1322), (661, 968)]