7788781690

素因数分解:

$2^1\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{391987}}^1$

素因数の和:393981

約数の個数: 16

約数和(自身を含む): 14026898592

約数和(自身を除く): 6238116902

約数列:

[1, 2, 5, 10, 1987, 3974, 9935, 19870, 391987, 783974, 1959935, 3919870, 778878169, 1557756338, 3894390845, 7788781690]

約数ペア:

[(1, 7788781690), (2, 3894390845), (5, 1557756338), (10, 778878169), (1987, 3919870), (3974, 1959935), (9935, 783974), (19870, 391987)]