131886280

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{21001}}^1$

素因数の和:21169

約数の個数: 32

約数和(自身を含む): 298648440

約数和(自身を除く): 166762160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 21001, 42002, 84004, 105005, 168008, 210010, 420020, 840040, 3297157, 6594314, 13188628, 16485785, 26377256, 32971570, 65943140, 131886280]

約数ペア:

[(1, 131886280), (2, 65943140), (4, 32971570), (5, 26377256), (8, 16485785), (10, 13188628), (20, 6594314), (40, 3297157), (157, 840040), (314, 420020), (628, 210010), (785, 168008), (1256, 105005), (1570, 84004), (3140, 42002), (6280, 21001)]