81611320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{7109}}^1$

素因数の和:7168

約数の個数: 64

約数和(自身を含む): 215006400

約数和(自身を除く): 133395080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 2296, 2870, 5740, 7109, 11480, 14218, 28436, 35545, 49763, 56872, 71090, 99526, 142180, 199052, 248815, 284360, 291469, 398104, 497630, 582938, 995260, 1165876, 1457345, 1990520, 2040283, 2331752, 2914690, 4080566, 5829380, 8161132, 10201415, 11658760, 16322264, 20402830, 40805660, 81611320]

約数ペア:

[(1, 81611320), (2, 40805660), (4, 20402830), (5, 16322264), (7, 11658760), (8, 10201415), (10, 8161132), (14, 5829380), (20, 4080566), (28, 2914690), (35, 2331752), (40, 2040283), (41, 1990520), (56, 1457345), (70, 1165876), (82, 995260), (140, 582938), (164, 497630), (205, 398104), (280, 291469), (287, 284360), (328, 248815), (410, 199052), (574, 142180), (820, 99526), (1148, 71090), (1435, 56872), (1640, 49763), (2296, 35545), (2870, 28436), (5740, 14218), (7109, 11480)]