81098900

素因数分解:

$2^2\times 5^2\times {\mathrm{810989}}^1$

素因数の和:811003

約数の個数: 18

約数和(自身を含む): 175984830

約数和(自身を除く): 94885930

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 810989, 1621978, 3243956, 4054945, 8109890, 16219780, 20274725, 40549450, 81098900]

約数ペア:

[(1, 81098900), (2, 40549450), (4, 20274725), (5, 16219780), (10, 8109890), (20, 4054945), (25, 3243956), (50, 1621978), (100, 810989)]