17920021

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2011}}^1$

素因数の和:2104

約数の個数: 16

約数和(自身を含む): 21890560

約数和(自身を除く): 3970539

約数列:

[1, 7, 19, 67, 133, 469, 1273, 2011, 8911, 14077, 38209, 134737, 267463, 943159, 2560003, 17920021]

約数ペア:

[(1, 17920021), (7, 2560003), (19, 943159), (67, 267463), (133, 134737), (469, 38209), (1273, 14077), (2011, 8911)]