18991505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{1861}}^1$

素因数の和:2036

約数の個数: 16

約数和(自身を含む): 24712464

約数和(自身を除く): 5720959

約数列:

[1, 5, 13, 65, 157, 785, 1861, 2041, 9305, 10205, 24193, 120965, 292177, 1460885, 3798301, 18991505]

約数ペア:

[(1, 18991505), (5, 3798301), (13, 1460885), (65, 292177), (157, 120965), (785, 24193), (1861, 10205), (2041, 9305)]