21308973

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{8527}}^1$

素因数の和:8561

約数の個数: 24

約数和(自身を含む): 34998912

約数和(自身を除く): 13689939

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 8527, 25581, 59689, 144959, 179067, 417823, 434877, 1014713, 1253469, 3044139, 7102991, 21308973]

約数ペア:

[(1, 21308973), (3, 7102991), (7, 3044139), (17, 1253469), (21, 1014713), (49, 434877), (51, 417823), (119, 179067), (147, 144959), (357, 59689), (833, 25581), (2499, 8527)]