20129785

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18217}}^1$

素因数の和:18252

約数の個数: 16

約数和(自身を含む): 27545616

約数和(自身を除く): 7415831

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 18217, 91085, 236821, 309689, 1184105, 1548445, 4025957, 20129785]

約数ペア:

[(1, 20129785), (5, 4025957), (13, 1548445), (17, 1184105), (65, 309689), (85, 236821), (221, 91085), (1105, 18217)]