2019905180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{31181}}^1$

素因数の和:31310

約数の個数: 48

約数和(自身を含む): 4400403840

約数和(自身を除く): 2380498660

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 790, 820, 1580, 3239, 6478, 12956, 16195, 31181, 32390, 62362, 64780, 124724, 155905, 311810, 623620, 1278421, 2463299, 2556842, 4926598, 5113684, 6392105, 9853196, 12316495, 12784210, 24632990, 25568420, 49265980, 100995259, 201990518, 403981036, 504976295, 1009952590, 2019905180]

約数ペア:

[(1, 2019905180), (2, 1009952590), (4, 504976295), (5, 403981036), (10, 201990518), (20, 100995259), (41, 49265980), (79, 25568420), (82, 24632990), (158, 12784210), (164, 12316495), (205, 9853196), (316, 6392105), (395, 5113684), (410, 4926598), (790, 2556842), (820, 2463299), (1580, 1278421), (3239, 623620), (6478, 311810), (12956, 155905), (16195, 124724), (31181, 64780), (32390, 62362)]