20868757

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{181}}^2$

素因数の和:389

約数の個数: 18

約数和(自身を含む): 26288514

約数和(自身を除く): 5419757

約数列:

[1, 7, 13, 49, 91, 181, 637, 1267, 2353, 8869, 16471, 32761, 115297, 229327, 425893, 1605289, 2981251, 20868757]

約数ペア:

[(1, 20868757), (7, 2981251), (13, 1605289), (49, 425893), (91, 229327), (181, 115297), (637, 32761), (1267, 16471), (2353, 8869)]