81647080

素因数分解:

$2^3\times 5^1\times {\mathrm{2041177}}^1$

素因数の和:2041188

約数の個数: 16

約数和(自身を含む): 183706020

約数和(自身を除く): 102058940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2041177, 4082354, 8164708, 10205885, 16329416, 20411770, 40823540, 81647080]

約数ペア:

[(1, 81647080), (2, 40823540), (4, 20411770), (5, 16329416), (8, 10205885), (10, 8164708), (20, 4082354), (40, 2041177)]