21250120

素因数分解:

$2^3\times 5^1\times {\mathrm{531253}}^1$

素因数の和:531264

約数の個数: 16

約数和(自身を含む): 47812860

約数和(自身を除く): 26562740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531253, 1062506, 2125012, 2656265, 4250024, 5312530, 10625060, 21250120]

約数ペア:

[(1, 21250120), (2, 10625060), (4, 5312530), (5, 4250024), (8, 2656265), (10, 2125012), (20, 1062506), (40, 531253)]