128959640

素因数分解:

$2^3\times 5^1\times {\mathrm{3223991}}^1$

素因数の和:3224002

約数の個数: 16

約数和(自身を含む): 290159280

約数和(自身を除く): 161199640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3223991, 6447982, 12895964, 16119955, 25791928, 32239910, 64479820, 128959640]

約数ペア:

[(1, 128959640), (2, 64479820), (4, 32239910), (5, 25791928), (8, 16119955), (10, 12895964), (20, 6447982), (40, 3223991)]