21309393

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53407}}^1$

素因数の和:53436

約数の個数: 16

約数和(自身を含む): 34181120

約数和(自身を除く): 12871727

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53407, 160221, 373849, 1014733, 1121547, 3044199, 7103131, 21309393]

約数ペア:

[(1, 21309393), (3, 7103131), (7, 3044199), (19, 1121547), (21, 1014733), (57, 373849), (133, 160221), (399, 53407)]