389619280

素因数分解:

$2^4\times 5^1\times {\mathrm{4870241}}^1$

素因数の和:4870254

約数の個数: 20

約数和(自身を含む): 905865012

約数和(自身を除く): 516245732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4870241, 9740482, 19480964, 24351205, 38961928, 48702410, 77923856, 97404820, 194809640, 389619280]

約数ペア:

[(1, 389619280), (2, 194809640), (4, 97404820), (5, 77923856), (8, 48702410), (10, 38961928), (16, 24351205), (20, 19480964), (40, 9740482), (80, 4870241)]