18687820

素因数分解:

$2^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{2647}}^1$

素因数の和:3009

約数の個数: 24

約数和(自身を含む): 39370464

約数和(自身を除く): 20682644

約数列:

[1, 2, 4, 5, 10, 20, 353, 706, 1412, 1765, 2647, 3530, 5294, 7060, 10588, 13235, 26470, 52940, 934391, 1868782, 3737564, 4671955, 9343910, 18687820]

約数ペア:

[(1, 18687820), (2, 9343910), (4, 4671955), (5, 3737564), (10, 1868782), (20, 934391), (353, 52940), (706, 26470), (1412, 13235), (1765, 10588), (2647, 7060), (3530, 5294)]