19900580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3467}}^1$

素因数の和:3524

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 29039836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3467, 5740, 6934, 13868, 17335, 24269, 34670, 48538, 69340, 97076, 121345, 142147, 242690, 284294, 485380, 568588, 710735, 995029, 1421470, 1990058, 2842940, 3980116, 4975145, 9950290, 19900580]

約数ペア:

[(1, 19900580), (2, 9950290), (4, 4975145), (5, 3980116), (7, 2842940), (10, 1990058), (14, 1421470), (20, 995029), (28, 710735), (35, 568588), (41, 485380), (70, 284294), (82, 242690), (140, 142147), (164, 121345), (205, 97076), (287, 69340), (410, 48538), (574, 34670), (820, 24269), (1148, 17335), (1435, 13868), (2870, 6934), (3467, 5740)]