21025870

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72503}}^1$

素因数の和:72539

約数の個数: 16

約数和(自身を含む): 39152160

約数和(自身を除く): 18126290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72503, 145006, 362515, 725030, 2102587, 4205174, 10512935, 21025870]

約数ペア:

[(1, 21025870), (2, 10512935), (5, 4205174), (10, 2102587), (29, 725030), (58, 362515), (145, 145006), (290, 72503)]