19645687570

素因数分解:

$2^1\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{988711}}^1$

素因数の和:990705

約数の個数: 16

約数和(自身を含む): 35380070208

約数和(自身を除く): 15734382638

約数列:

[1, 2, 5, 10, 1987, 3974, 9935, 19870, 988711, 1977422, 4943555, 9887110, 1964568757, 3929137514, 9822843785, 19645687570]

約数ペア:

[(1, 19645687570), (2, 9822843785), (5, 3929137514), (10, 1964568757), (1987, 9887110), (3974, 4943555), (9935, 1977422), (19870, 988711)]