20617720

素因数分解:

$2^3\times 5^1\times {\mathrm{709}}^1\times {\mathrm{727}}^1$

素因数の和:1447

約数の個数: 32

約数和(自身を含む): 46519200

約数和(自身を除く): 25901480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 709, 727, 1418, 1454, 2836, 2908, 3545, 3635, 5672, 5816, 7090, 7270, 14180, 14540, 28360, 29080, 515443, 1030886, 2061772, 2577215, 4123544, 5154430, 10308860, 20617720]

約数ペア:

[(1, 20617720), (2, 10308860), (4, 5154430), (5, 4123544), (8, 2577215), (10, 2061772), (20, 1030886), (40, 515443), (709, 29080), (727, 28360), (1418, 14540), (1454, 14180), (2836, 7270), (2908, 7090), (3545, 5816), (3635, 5672)]