19882090

素因数分解:

$2^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:406

約数の個数: 32

約数和(自身を含む): 36691200

約数和(自身を除く): 16809110

約数列:

[1, 2, 5, 10, 97, 103, 194, 199, 206, 398, 485, 515, 970, 995, 1030, 1990, 9991, 19303, 19982, 20497, 38606, 40994, 49955, 96515, 99910, 102485, 193030, 204970, 1988209, 3976418, 9941045, 19882090]

約数ペア:

[(1, 19882090), (2, 9941045), (5, 3976418), (10, 1988209), (97, 204970), (103, 193030), (194, 102485), (199, 99910), (206, 96515), (398, 49955), (485, 40994), (515, 38606), (970, 20497), (995, 19982), (1030, 19303), (1990, 9991)]