18980360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1279}}^1$

素因数の和:1350

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 30786040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1279, 1484, 1855, 2120, 2558, 2968, 3710, 5116, 6395, 7420, 8953, 10232, 12790, 14840, 17906, 25580, 35812, 44765, 51160, 67787, 71624, 89530, 135574, 179060, 271148, 338935, 358120, 474509, 542296, 677870, 949018, 1355740, 1898036, 2372545, 2711480, 3796072, 4745090, 9490180, 18980360]

約数ペア:

[(1, 18980360), (2, 9490180), (4, 4745090), (5, 3796072), (7, 2711480), (8, 2372545), (10, 1898036), (14, 1355740), (20, 949018), (28, 677870), (35, 542296), (40, 474509), (53, 358120), (56, 338935), (70, 271148), (106, 179060), (140, 135574), (212, 89530), (265, 71624), (280, 67787), (371, 51160), (424, 44765), (530, 35812), (742, 25580), (1060, 17906), (1279, 14840), (1484, 12790), (1855, 10232), (2120, 8953), (2558, 7420), (2968, 6395), (3710, 5116)]