39891440

素因数分解:

$2^4\times 5^1\times {\mathrm{498643}}^1$

素因数の和:498656

約数の個数: 20

約数和(自身を含む): 92747784

約数和(自身を除く): 52856344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 498643, 997286, 1994572, 2493215, 3989144, 4986430, 7978288, 9972860, 19945720, 39891440]

約数ペア:

[(1, 39891440), (2, 19945720), (4, 9972860), (5, 7978288), (8, 4986430), (10, 3989144), (16, 2493215), (20, 1994572), (40, 997286), (80, 498643)]