81714680

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3187}}^1$

素因数の和:3839

約数の個数: 32

約数和(自身を含む): 184202640

約数和(自身を除く): 102487960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3187, 3205, 5128, 6374, 6410, 12748, 12820, 15935, 25496, 25640, 31870, 63740, 127480, 2042867, 4085734, 8171468, 10214335, 16342936, 20428670, 40857340, 81714680]

約数ペア:

[(1, 81714680), (2, 40857340), (4, 20428670), (5, 16342936), (8, 10214335), (10, 8171468), (20, 4085734), (40, 2042867), (641, 127480), (1282, 63740), (2564, 31870), (3187, 25640), (3205, 25496), (5128, 15935), (6374, 12820), (6410, 12748)]