128978840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{169709}}^1$

素因数の和:169739

約数の個数: 32

約数和(自身を含む): 305478000

約数和(自身を除く): 176499160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 169709, 339418, 678836, 848545, 1357672, 1697090, 3224471, 3394180, 6448942, 6788360, 12897884, 16122355, 25795768, 32244710, 64489420, 128978840]

約数ペア:

[(1, 128978840), (2, 64489420), (4, 32244710), (5, 25795768), (8, 16122355), (10, 12897884), (19, 6788360), (20, 6448942), (38, 3394180), (40, 3224471), (76, 1697090), (95, 1357672), (152, 848545), (190, 678836), (380, 339418), (760, 169709)]