28440080

素因数分解:

$2^4\times 5^1\times {\mathrm{355501}}^1$

素因数の和:355514

約数の個数: 20

約数和(自身を含む): 66123372

約数和(自身を除く): 37683292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355501, 711002, 1422004, 1777505, 2844008, 3555010, 5688016, 7110020, 14220040, 28440080]

約数ペア:

[(1, 28440080), (2, 14220040), (4, 7110020), (5, 5688016), (8, 3555010), (10, 2844008), (16, 1777505), (20, 1422004), (40, 711002), (80, 355501)]