21130960

素因数分解:

$2^4\times 5^1\times {\mathrm{264137}}^1$

素因数の和:264150

約数の個数: 20

約数和(自身を含む): 49129668

約数和(自身を除く): 27998708

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264137, 528274, 1056548, 1320685, 2113096, 2641370, 4226192, 5282740, 10565480, 21130960]

約数ペア:

[(1, 21130960), (2, 10565480), (4, 5282740), (5, 4226192), (8, 2641370), (10, 2113096), (16, 1320685), (20, 1056548), (40, 528274), (80, 264137)]