205121440

素因数分解:

$2^5\times 5^1\times {\mathrm{1282009}}^1$

素因数の和:1282024

約数の個数: 24

約数和(自身を含む): 484599780

約数和(自身を除く): 279478340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 1282009, 2564018, 5128036, 6410045, 10256072, 12820090, 20512144, 25640180, 41024288, 51280360, 102560720, 205121440]

約数ペア:

[(1, 205121440), (2, 102560720), (4, 51280360), (5, 41024288), (8, 25640180), (10, 20512144), (16, 12820090), (20, 10256072), (32, 6410045), (40, 5128036), (80, 2564018), (160, 1282009)]