20865946

素因数分解:

$2^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1\times {\mathrm{509}}^1$

素因数の和:813

約数の個数: 16

約数和(自身を含む): 31824000

約数和(自身を除く): 10958054

約数列:

[1, 2, 103, 199, 206, 398, 509, 1018, 20497, 40994, 52427, 101291, 104854, 202582, 10432973, 20865946]

約数ペア:

[(1, 20865946), (2, 10432973), (103, 202582), (199, 104854), (206, 101291), (398, 52427), (509, 40994), (1018, 20497)]