20128857

素因数分解:

$3^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{919}}^1$

素因数の和:1085

約数の個数: 24

約数和(自身を含む): 31464000

約数和(自身を除く): 11335143

約数列:

[1, 3, 7, 21, 49, 147, 149, 447, 919, 1043, 2757, 3129, 6433, 7301, 19299, 21903, 45031, 135093, 136931, 410793, 958517, 2875551, 6709619, 20128857]

約数ペア:

[(1, 20128857), (3, 6709619), (7, 2875551), (21, 958517), (49, 410793), (147, 136931), (149, 135093), (447, 45031), (919, 21903), (1043, 19299), (2757, 7301), (3129, 6433)]