18902015

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:383

約数の個数: 24

約数和(自身を含む): 25216800

約数和(自身を除く): 6314785

約数列:

[1, 5, 11, 55, 121, 157, 199, 605, 785, 995, 1727, 2189, 8635, 10945, 18997, 24079, 31243, 94985, 120395, 156215, 343673, 1718365, 3780403, 18902015]

約数ペア:

[(1, 18902015), (5, 3780403), (11, 1718365), (55, 343673), (121, 156215), (157, 120395), (199, 94985), (605, 31243), (785, 24079), (995, 18997), (1727, 10945), (2189, 8635)]