20659639

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{20639}}^1$

素因数の和:20670

約数の個数: 16

約数和(自身を含む): 27740160

約数和(自身を除く): 7080521

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 20639, 144473, 227029, 268307, 1589203, 1878149, 2951377, 20659639]

約数ペア:

[(1, 20659639), (7, 2951377), (11, 1878149), (13, 1589203), (77, 268307), (91, 227029), (143, 144473), (1001, 20639)]