20778105

素因数分解:

$3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{10111}}^1$

素因数の和:10256

約数の個数: 16

約数和(自身を含む): 33490944

約数和(自身を除く): 12712839

約数列:

[1, 3, 5, 15, 137, 411, 685, 2055, 10111, 30333, 50555, 151665, 1385207, 4155621, 6926035, 20778105]

約数ペア:

[(1, 20778105), (3, 6926035), (5, 4155621), (15, 1385207), (137, 151665), (411, 50555), (685, 30333), (2055, 10111)]