19778495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{8363}}^1$

素因数の和:8422

約数の個数: 16

約数和(自身を含む): 26497152

約数和(自身を除く): 6718657

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 8363, 41815, 91993, 359609, 459965, 1798045, 3955699, 19778495]

約数ペア:

[(1, 19778495), (5, 3955699), (11, 1798045), (43, 459965), (55, 359609), (215, 91993), (473, 41815), (2365, 8363)]