7980040

素因数分解:

$2^3\times 5^1\times {\mathrm{199501}}^1$

素因数の和:199512

約数の個数: 16

約数和(自身を含む): 17955180

約数和(自身を除く): 9975140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199501, 399002, 798004, 997505, 1596008, 1995010, 3990020, 7980040]

約数ペア:

[(1, 7980040), (2, 3990020), (4, 1995010), (5, 1596008), (8, 997505), (10, 798004), (20, 399002), (40, 199501)]