80455640

素因数分解:

$2^3\times 5^1\times {\mathrm{2011391}}^1$

素因数の和:2011402

約数の個数: 16

約数和(自身を含む): 181025280

約数和(自身を除く): 100569640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2011391, 4022782, 8045564, 10056955, 16091128, 20113910, 40227820, 80455640]

約数ペア:

[(1, 80455640), (2, 40227820), (4, 20113910), (5, 16091128), (8, 10056955), (10, 8045564), (20, 4022782), (40, 2011391)]