21288618

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{90977}}^1$

素因数の和:90998

約数の個数: 24

約数和(自身を含む): 49673988

約数和(自身を除く): 28385370

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 90977, 181954, 272931, 545862, 818793, 1182701, 1637586, 2365402, 3548103, 7096206, 10644309, 21288618]

約数ペア:

[(1, 21288618), (2, 10644309), (3, 7096206), (6, 3548103), (9, 2365402), (13, 1637586), (18, 1182701), (26, 818793), (39, 545862), (78, 272931), (117, 181954), (234, 90977)]