80431280

素因数分解:

$2^4\times 5^1\times {\mathrm{1005391}}^1$

素因数の和:1005404

約数の個数: 20

約数和(自身を含む): 187002912

約数和(自身を除く): 106571632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1005391, 2010782, 4021564, 5026955, 8043128, 10053910, 16086256, 20107820, 40215640, 80431280]

約数ペア:

[(1, 80431280), (2, 40215640), (4, 20107820), (5, 16086256), (8, 10053910), (10, 8043128), (16, 5026955), (20, 4021564), (40, 2010782), (80, 1005391)]