20915678

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{87881}}^1$

素因数の和:87907

約数の個数: 16

約数和(自身を含む): 37965024

約数和(自身を除く): 17049346

約数列:

[1, 2, 7, 14, 17, 34, 119, 238, 87881, 175762, 615167, 1230334, 1493977, 2987954, 10457839, 20915678]

約数ペア:

[(1, 20915678), (2, 10457839), (7, 2987954), (14, 1493977), (17, 1230334), (34, 615167), (119, 175762), (238, 87881)]