20510917

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:273

約数の個数: 24

約数和(自身を含む): 25482240

約数和(自身を除く): 4971323

約数列:

[1, 7, 23, 29, 161, 191, 203, 529, 667, 1337, 3703, 4393, 4669, 5539, 15341, 30751, 38773, 101039, 107387, 127397, 707273, 891779, 2930131, 20510917]

約数ペア:

[(1, 20510917), (7, 2930131), (23, 891779), (29, 707273), (161, 127397), (191, 107387), (203, 101039), (529, 38773), (667, 30751), (1337, 15341), (3703, 5539), (4393, 4669)]