19945720

素因数分解:

$2^3\times 5^1\times {\mathrm{498643}}^1$

素因数の和:498654

約数の個数: 16

約数和(自身を含む): 44877960

約数和(自身を除く): 24932240

約数列:

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

約数ペア:

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