20803991

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{397}}^1$

素因数の和:578

約数の個数: 16

約数和(自身を含む): 23402400

約数和(自身を除く): 2598409

約数列:

[1, 13, 29, 139, 377, 397, 1807, 4031, 5161, 11513, 52403, 55183, 149669, 717379, 1600307, 20803991]

約数ペア:

[(1, 20803991), (13, 1600307), (29, 717379), (139, 149669), (377, 55183), (397, 52403), (1807, 11513), (4031, 5161)]