81556360

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{449}}^1$

素因数の和:718

約数の個数: 64

約数和(自身を含む): 194400000

約数和(自身を除く): 112843640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 239, 380, 449, 478, 760, 898, 956, 1195, 1796, 1912, 2245, 2390, 3592, 4490, 4541, 4780, 8531, 8980, 9082, 9560, 17062, 17960, 18164, 22705, 34124, 36328, 42655, 45410, 68248, 85310, 90820, 107311, 170620, 181640, 214622, 341240, 429244, 536555, 858488, 1073110, 2038909, 2146220, 4077818, 4292440, 8155636, 10194545, 16311272, 20389090, 40778180, 81556360]

約数ペア:

[(1, 81556360), (2, 40778180), (4, 20389090), (5, 16311272), (8, 10194545), (10, 8155636), (19, 4292440), (20, 4077818), (38, 2146220), (40, 2038909), (76, 1073110), (95, 858488), (152, 536555), (190, 429244), (239, 341240), (380, 214622), (449, 181640), (478, 170620), (760, 107311), (898, 90820), (956, 85310), (1195, 68248), (1796, 45410), (1912, 42655), (2245, 36328), (2390, 34124), (3592, 22705), (4490, 18164), (4541, 17960), (4780, 17062), (8531, 9560), (8980, 9082)]