8640247

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{101}}^2$

素因数の和:231

約数の個数: 18

約数和(自身を含む): 10962392

約数和(自身を除く): 2322145

約数列:

[1, 7, 11, 77, 101, 121, 707, 847, 1111, 7777, 10201, 12221, 71407, 85547, 112211, 785477, 1234321, 8640247]

約数ペア:

[(1, 8640247), (7, 1234321), (11, 785477), (77, 112211), (101, 85547), (121, 71407), (707, 12221), (847, 10201), (1111, 7777)]