20907505

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{2179}}^1$

素因数の和:2304

約数の個数: 16

約数和(自身を含む): 26683200

約数和(自身を除く): 5775695

約数列:

[1, 5, 19, 95, 101, 505, 1919, 2179, 9595, 10895, 41401, 207005, 220079, 1100395, 4181501, 20907505]

約数ペア:

[(1, 20907505), (5, 4181501), (19, 1100395), (95, 220079), (101, 207005), (505, 41401), (1919, 10895), (2179, 9595)]