20688880

素因数分解:

$2^4\times 5^1\times {\mathrm{258611}}^1$

素因数の和:258624

約数の個数: 20

約数和(自身を含む): 48101832

約数和(自身を除く): 27412952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258611, 517222, 1034444, 1293055, 2068888, 2586110, 4137776, 5172220, 10344440, 20688880]

約数ペア:

[(1, 20688880), (2, 10344440), (4, 5172220), (5, 4137776), (8, 2586110), (10, 2068888), (16, 1293055), (20, 1034444), (40, 517222), (80, 258611)]