21388262

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{80407}}^1$

素因数の和:80435

約数の個数: 16

約数和(自身を含む): 38595840

約数和(自身を除く): 17207578

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 80407, 160814, 562849, 1125698, 1527733, 3055466, 10694131, 21388262]

約数ペア:

[(1, 21388262), (2, 10694131), (7, 3055466), (14, 1527733), (19, 1125698), (38, 562849), (133, 160814), (266, 80407)]