9979990

素因数分解:

$2^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3209}}^1$

素因数の和:3527

約数の個数: 16

約数和(自身を含む): 18027360

約数和(自身を除く): 8047370

約数列:

[1, 2, 5, 10, 311, 622, 1555, 3110, 3209, 6418, 16045, 32090, 997999, 1995998, 4989995, 9979990]

約数ペア:

[(1, 9979990), (2, 4989995), (5, 1995998), (10, 997999), (311, 32090), (622, 16045), (1555, 6418), (3110, 3209)]