80921540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1163}}^1$

素因数の和:1257

約数の個数: 72

約数和(自身を含む): 200636352

約数和(自身を除く): 119714812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 284, 355, 490, 497, 710, 980, 994, 1163, 1420, 1988, 2326, 2485, 3479, 4652, 4970, 5815, 6958, 8141, 9940, 11630, 13916, 16282, 17395, 23260, 32564, 34790, 40705, 56987, 69580, 81410, 82573, 113974, 162820, 165146, 227948, 284935, 330292, 412865, 569870, 578011, 825730, 1139740, 1156022, 1651460, 2312044, 2890055, 4046077, 5780110, 8092154, 11560220, 16184308, 20230385, 40460770, 80921540]

約数ペア:

[(1, 80921540), (2, 40460770), (4, 20230385), (5, 16184308), (7, 11560220), (10, 8092154), (14, 5780110), (20, 4046077), (28, 2890055), (35, 2312044), (49, 1651460), (70, 1156022), (71, 1139740), (98, 825730), (140, 578011), (142, 569870), (196, 412865), (245, 330292), (284, 284935), (355, 227948), (490, 165146), (497, 162820), (710, 113974), (980, 82573), (994, 81410), (1163, 69580), (1420, 56987), (1988, 40705), (2326, 34790), (2485, 32564), (3479, 23260), (4652, 17395), (4970, 16282), (5815, 13916), (6958, 11630), (8141, 9940)]