20979764

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1289}}^1$

素因数の和:1619

約数の個数: 24

約数和(自身を含む): 39695880

約数和(自身を除く): 18716116

約数列:

[1, 2, 4, 13, 26, 52, 313, 626, 1252, 1289, 2578, 4069, 5156, 8138, 16276, 16757, 33514, 67028, 403457, 806914, 1613828, 5244941, 10489882, 20979764]

約数ペア:

[(1, 20979764), (2, 10489882), (4, 5244941), (13, 1613828), (26, 806914), (52, 403457), (313, 67028), (626, 33514), (1252, 16757), (1289, 16276), (2578, 8138), (4069, 5156)]