64851440

素因数分解:

$2^4\times 5^1\times {\mathrm{810643}}^1$

素因数の和:810656

約数の個数: 20

約数和(自身を含む): 150779784

約数和(自身を除く): 85928344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810643, 1621286, 3242572, 4053215, 6485144, 8106430, 12970288, 16212860, 32425720, 64851440]

約数ペア:

[(1, 64851440), (2, 32425720), (4, 16212860), (5, 12970288), (8, 8106430), (10, 6485144), (16, 4053215), (20, 3242572), (40, 1621286), (80, 810643)]