640393443

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{12823}}^1$

素因数の和:13039

約数の個数: 24

約数和(自身を含む): 960261120

約数和(自身を除く): 319867677

約数列:

[1, 3, 9, 31, 93, 179, 279, 537, 1611, 5549, 12823, 16647, 38469, 49941, 115407, 397513, 1192539, 2295317, 3577617, 6885951, 20657853, 71154827, 213464481, 640393443]

約数ペア:

[(1, 640393443), (3, 213464481), (9, 71154827), (31, 20657853), (93, 6885951), (179, 3577617), (279, 2295317), (537, 1192539), (1611, 397513), (5549, 115407), (12823, 49941), (16647, 38469)]