21179263

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{4139}}^1$

素因数の和:4206

約数の個数: 16

約数和(自身を含む): 26231040

約数和(自身を除く): 5051777

約数列:

[1, 7, 17, 43, 119, 301, 731, 4139, 5117, 28973, 70363, 177977, 492541, 1245839, 3025609, 21179263]

約数ペア:

[(1, 21179263), (7, 3025609), (17, 1245839), (43, 492541), (119, 177977), (301, 70363), (731, 28973), (4139, 5117)]