21605283

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20173}}^1$

素因数の和:20203

約数の個数: 24

約数和(自身を含む): 37765728

約数和(自身を除く): 16160445

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20173, 60519, 141211, 181557, 342941, 423633, 1028823, 1270899, 2400587, 3086469, 7201761, 21605283]

約数ペア:

[(1, 21605283), (3, 7201761), (7, 3086469), (9, 2400587), (17, 1270899), (21, 1028823), (51, 423633), (63, 342941), (119, 181557), (153, 141211), (357, 60519), (1071, 20173)]