18705215

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:327

約数の個数: 24

約数和(自身を含む): 24341328

約数和(自身を除く): 5636113

約数列:

[1, 5, 19, 43, 95, 215, 241, 361, 817, 1205, 1805, 4085, 4579, 10363, 15523, 22895, 51815, 77615, 87001, 196897, 435005, 984485, 3741043, 18705215]

約数ペア:

[(1, 18705215), (5, 3741043), (19, 984485), (43, 435005), (95, 196897), (215, 87001), (241, 77615), (361, 51815), (817, 22895), (1205, 15523), (1805, 10363), (4085, 4579)]