21275090

素因数分解:

$2^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{10691}}^1$

素因数の和:10897

約数の個数: 16

約数和(自身を含む): 38491200

約数和(自身を除く): 17216110

約数列:

[1, 2, 5, 10, 199, 398, 995, 1990, 10691, 21382, 53455, 106910, 2127509, 4255018, 10637545, 21275090]

約数ペア:

[(1, 21275090), (2, 10637545), (5, 4255018), (10, 2127509), (199, 106910), (398, 53455), (995, 21382), (1990, 10691)]