18978867

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{5449}}^1$

素因数の和:5504

約数の個数: 20

約数和(自身を含む): 29015800

約数和(自身を除く): 10036933

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 5449, 16347, 49041, 147123, 234307, 441369, 702921, 2108763, 6326289, 18978867]

約数ペア:

[(1, 18978867), (3, 6326289), (9, 2108763), (27, 702921), (43, 441369), (81, 234307), (129, 147123), (387, 49041), (1161, 16347), (3483, 5449)]