19640902

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{809}}^1$

素因数の和:1071

約数の個数: 16

約数和(自身を含む): 30132000

約数和(自身を除く): 10491098

約数列:

[1, 2, 61, 122, 199, 398, 809, 1618, 12139, 24278, 49349, 98698, 160991, 321982, 9820451, 19640902]

約数ペア:

[(1, 19640902), (2, 9820451), (61, 321982), (122, 160991), (199, 98698), (398, 49349), (809, 24278), (1618, 12139)]