21564389

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{2719}}^1$

素因数の和:2840

約数の個数: 16

約数和(自身を含む): 27156480

約数和(自身を除く): 5592091

約数列:

[1, 7, 11, 77, 103, 721, 1133, 2719, 7931, 19033, 29909, 209363, 280057, 1960399, 3080627, 21564389]

約数ペア:

[(1, 21564389), (7, 3080627), (11, 1960399), (77, 280057), (103, 209363), (721, 29909), (1133, 19033), (2719, 7931)]