19980794

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{823}}^1$

素因数の和:1085

約数の個数: 16

約数和(自身を含む): 30652800

約数和(自身を除く): 10672006

約数列:

[1, 2, 61, 122, 199, 398, 823, 1646, 12139, 24278, 50203, 100406, 163777, 327554, 9990397, 19980794]

約数ペア:

[(1, 19980794), (2, 9990397), (61, 327554), (122, 163777), (199, 100406), (398, 50203), (823, 24278), (1646, 12139)]