9998989

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1427}}^1$

素因数の和:1465

約数の個数: 24

約数和(自身を含む): 13674528

約数和(自身を除く): 3675539

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 1427, 7007, 9989, 15697, 18551, 69923, 109879, 129857, 204061, 769153, 908999, 1428427, 9998989]

約数ペア:

[(1, 9998989), (7, 1428427), (11, 908999), (13, 769153), (49, 204061), (77, 129857), (91, 109879), (143, 69923), (539, 18551), (637, 15697), (1001, 9989), (1427, 7007)]