81366460

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{409}}^1$

素因数の和:468

約数の個数: 96

約数和(自身を含む): 206640000

約数和(自身を除く): 125273540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 343, 406, 409, 490, 580, 686, 812, 818, 980, 1015, 1372, 1421, 1636, 1715, 2030, 2045, 2842, 2863, 3430, 4060, 4090, 5684, 5726, 6860, 7105, 8180, 9947, 11452, 11861, 14210, 14315, 19894, 20041, 23722, 28420, 28630, 39788, 40082, 47444, 49735, 57260, 59305, 80164, 83027, 99470, 100205, 118610, 140287, 166054, 198940, 200410, 237220, 280574, 332108, 400820, 415135, 561148, 581189, 701435, 830270, 1162378, 1402870, 1660540, 2324756, 2805740, 2905945, 4068323, 5811890, 8136646, 11623780, 16273292, 20341615, 40683230, 81366460]

約数ペア:

[(1, 81366460), (2, 40683230), (4, 20341615), (5, 16273292), (7, 11623780), (10, 8136646), (14, 5811890), (20, 4068323), (28, 2905945), (29, 2805740), (35, 2324756), (49, 1660540), (58, 1402870), (70, 1162378), (98, 830270), (116, 701435), (140, 581189), (145, 561148), (196, 415135), (203, 400820), (245, 332108), (290, 280574), (343, 237220), (406, 200410), (409, 198940), (490, 166054), (580, 140287), (686, 118610), (812, 100205), (818, 99470), (980, 83027), (1015, 80164), (1372, 59305), (1421, 57260), (1636, 49735), (1715, 47444), (2030, 40082), (2045, 39788), (2842, 28630), (2863, 28420), (3430, 23722), (4060, 20041), (4090, 19894), (5684, 14315), (5726, 14210), (6860, 11861), (7105, 11452), (8180, 9947)]