19171985

素因数分解:

$5^1\times 7^4\times {\mathrm{1597}}^1$

素因数の和:1630

約数の個数: 20

約数和(自身を含む): 26855988

約数和(自身を除く): 7684003

約数列:

[1, 5, 7, 35, 49, 245, 343, 1597, 1715, 2401, 7985, 11179, 12005, 55895, 78253, 391265, 547771, 2738855, 3834397, 19171985]

約数ペア:

[(1, 19171985), (5, 3834397), (7, 2738855), (35, 547771), (49, 391265), (245, 78253), (343, 55895), (1597, 12005), (1715, 11179), (2401, 7985)]