20681815

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53719}}^1$

素因数の和:53742

約数の個数: 16

約数和(自身を含む): 30942720

約数和(自身を除く): 10260905

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 53719, 268595, 376033, 590909, 1880165, 2954545, 4136363, 20681815]

約数ペア:

[(1, 20681815), (5, 4136363), (7, 2954545), (11, 1880165), (35, 590909), (55, 376033), (77, 268595), (385, 53719)]