20989899

素因数分解:

$3^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{5647}}^1$

素因数の和:5719

約数の個数: 24

約数和(自身を含む): 35243520

約数和(自身を除く): 14253621

約数列:

[1, 3, 7, 9, 21, 59, 63, 177, 413, 531, 1239, 3717, 5647, 16941, 39529, 50823, 118587, 333173, 355761, 999519, 2332211, 2998557, 6996633, 20989899]

約数ペア:

[(1, 20989899), (3, 6996633), (7, 2998557), (9, 2332211), (21, 999519), (59, 355761), (63, 333173), (177, 118587), (413, 50823), (531, 39529), (1239, 16941), (3717, 5647)]