21455978

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{269}}^1\times {\mathrm{2099}}^1$

素因数の和:2389

約数の個数: 16

約数和(自身を含む): 34020000

約数和(自身を除く): 12564022

約数列:

[1, 2, 19, 38, 269, 538, 2099, 4198, 5111, 10222, 39881, 79762, 564631, 1129262, 10727989, 21455978]

約数ペア:

[(1, 21455978), (2, 10727989), (19, 1129262), (38, 564631), (269, 79762), (538, 39881), (2099, 10222), (4198, 5111)]